diff --git a/.github/workflows/build_deploy.yml b/.github/workflows/build_deploy.yml index 4a6bfd4..97ed948 100644 --- a/.github/workflows/build_deploy.yml +++ b/.github/workflows/build_deploy.yml @@ -3,10 +3,15 @@ name: build_deploy on: push: branches: - - main - # - staging + - main + paths-ignore: + - README.md + - CONTRIBUTING.md + - LICENSE + - .gitignore + - .github/** + - "!.github/workflows/build_deploy.yml" pull_request: - repository_dispatch: workflow_dispatch: # Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages @@ -22,60 +27,42 @@ concurrency: cancel-in-progress: false jobs: - # set_environment: - # outputs: - # my_env: ${{ steps.setenv.outputs.my_env }} - # my_url: ${{ steps.setenv.outputs.my_url }} - # runs-on: ubuntu-latest - # steps: - # - id: setenv - # run: | - # if [ "$GITHUB_REF" = "refs/heads/main" ] - # then - # echo "::set-output name=my_env::production" - # echo "::set-output name=my_url::https://www.tebako.org" - # elif [ "$GITHUB_REF" = "refs/heads/staging" ] - # then - # echo "::set-output name=my_env::staging" - # echo "::set-output name=my_url::https://staging-www.tebako.org" - # fi - build: runs-on: ubuntu-latest - # needs: [set_environment] steps: - name: Checkout - uses: actions/checkout@v3 + uses: actions/checkout@v6 - - name: Setup Ruby - uses: ruby/setup-ruby@v1 - with: - ruby-version: '3.1' - bundler-cache: true - cache-version: 0 # Increment this number if you need to re-download cached gems - name: Setup Pages id: pages - uses: actions/configure-pages@v3 + uses: actions/configure-pages@v5 + + - name: Setup Node + uses: actions/setup-node@v6 + with: + node-version: 24 + cache: 'npm' + + - name: Install dependencies + run: npm ci - - name: Build with Jekyll - # Outputs to the './_site' directory by default - run: bundle exec jekyll build --baseurl "${{ steps.pages.outputs.base_path }}" - env: - JEKYLL_ENV: production + - name: Build + run: npm run build - name: Upload artifact - # Automatically uploads an artifact from the './_site' directory by default - uses: actions/upload-pages-artifact@v2 + uses: actions/upload-pages-artifact@v4 + with: + path: .vitepress/dist # Deployment job deploy: environment: name: github-pages url: ${{ steps.deployment.outputs.page_url }} - if: ${{ github.ref == 'refs/heads/main' }} + if: github.ref_name == github.event.repository.default_branch runs-on: ubuntu-latest needs: build steps: - name: Deploy to GitHub Pages id: deployment - uses: actions/deploy-pages@v2 + uses: actions/deploy-pages@v4 diff --git a/.github/workflows/links.yml b/.github/workflows/links.yml index a17cdc1..070b7d2 100644 --- a/.github/workflows/links.yml +++ b/.github/workflows/links.yml @@ -1,39 +1,88 @@ -name: links +name: Link Checker on: push: branches: - - main - - staging + - main pull_request: + workflow_dispatch: + +permissions: + contents: read + pull-requests: write jobs: link_checker: runs-on: ubuntu-latest steps: - - uses: actions/checkout@v3 - - - uses: ruby/setup-ruby@v1 - with: - ruby-version: '3.1' - bundler-cache: true - - - name: Build site - env: - JEKYLL_ENV: production - run: make _site - - - name: Link Checker - uses: lycheeverse/lychee-action@v1.4.1 - with: - args: --verbose --no-progress --exclude-file .lycheeignore -- _site/**/*.html - fail: true - env: - GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}} - - # - name: Create Issue From File - # uses: peter-evans/create-issue-from-file@v2 - # with: - # title: Link Checker Report - # content-filepath: ./lychee/out.md - # labels: report, automated issue + - uses: actions/checkout@v6 + + - name: Setup Node + uses: actions/setup-node@v6 + with: + node-version: 24 + cache: 'npm' + cache-dependency-path: package-lock.json + + - name: Install dependencies + run: npm ci + + - name: Build + run: npm run build + + - name: Restore lychee cache + uses: actions/cache@v4 + with: + path: .lycheecache + key: cache-lychee-${{ github.sha }} + restore-keys: cache-lychee- + + - name: Check if site was built + run: | + if [ ! -d ".vitepress/dist" ]; then + echo "Error: .vitepress/dist directory not created" + exit 1 + fi + echo "Site built successfully" + ls -la .vitepress/dist/ + + - name: Link Checker + uses: lycheeverse/lychee-action@v2 + with: + args: >- + --verbose + --no-progress + --config lychee.toml + --root-dir ${{ github.workspace }}/.vitepress/dist + .vitepress/dist/**/*.html + fail: true + output: link-check-results.md + format: markdown + + - name: Upload link check results + if: always() + uses: actions/upload-artifact@v4 + with: + name: link-check-results + path: link-check-results.md + retention-days: 30 + + - name: Comment PR with results + if: failure() && github.event_name == 'pull_request' + uses: actions/github-script@v7 + with: + script: | + const fs = require('fs'); + let comment = '## πŸ”— Link Check Failed\n\n'; + + if (fs.existsSync('link-check-results.md')) { + const results = fs.readFileSync('link-check-results.md', 'utf8'); + comment += '### Results\n\n' + results + '\n\n'; + } + + github.rest.issues.createComment({ + issue_number: context.issue.number, + owner: context.repo.owner, + repo: context.repo.repo, + body: comment + }); diff --git a/.gitignore b/.gitignore index 77a019a..b286963 100644 --- a/.gitignore +++ b/.gitignore @@ -1,15 +1,34 @@ +# Dependencies +node_modules/ -_software/*/.git -_software/*/docs -_software/_*_repo -_specs/*/ -!_specs/*.* +# Build output +dist/ +.vitepress/dist/ +.vitepress/cache/ + +# Ruby / Jekyll (legacy) _site/ .sass-cache/ .jekyll-cache/ .jekyll-metadata +.bundle/ +vendor/ + +# Logs +*.log +npm-debug.log* + +# Editor directories +.vscode/ +.idea/ + +# OS files +.DS_Store +Thumbs.db + +# Misc +tmp/ +artifacts/ -node_modules -tmp -artifacts -dist +# Claude Code memory (local only) +.claude/ diff --git a/.vitepress/config.ts b/.vitepress/config.ts new file mode 100644 index 0000000..cbe44bf --- /dev/null +++ b/.vitepress/config.ts @@ -0,0 +1,166 @@ +import { defineConfig } from 'vitepress' +import { asciidocPlugin } from './plugins/asciidoc' +import { readFileSync } from 'node:fs' +import { resolve, dirname } from 'node:path' +import { fileURLToPath } from 'node:url' + +const __dirname = dirname(fileURLToPath(import.meta.url)) +const root = resolve(__dirname, '..') + +const TYPE_FILE: Record = { + units: 'units', quantities: 'quantities', dimensions: 'dimensions', + prefixes: 'prefixes', scales: 'scales', systems: 'unit_systems', +} +const TYPE_LABEL: Record = { + units: 'Unit', quantities: 'Quantity', dimensions: 'Dimension', + prefixes: 'Prefix', scales: 'Scale', systems: 'Unit System', +} + +// Build a lookup: slug β†’ entity name, loaded once at build +const slugToName: Record> = {} +for (const [urlType, fileKey] of Object.entries(TYPE_FILE)) { + const raw = readFileSync(resolve(root, `public/unitsdb/${fileKey}.json`), 'utf-8') + const items: any[] = JSON.parse(raw) + slugToName[urlType] = {} + for (const item of items) { + const slug = item.unitsml_id.replace(/[^a-zA-Z0-9._-]/g, '_') + slugToName[urlType][slug] = item.name + } +} + +export default defineConfig({ + title: 'UnitsML', + description: 'A set of models for unambiguously encoding and identifying scientific units of measure and quantities', + lang: 'en-US', + lastUpdated: true, + srcExclude: ['CLAUDE.md'], + + transformPageData(pageData) { + const params = (pageData as any).params + if (params?.type && params?.id) { + const label = TYPE_LABEL[params.type] || params.type + const name = slugToName[params.type]?.[params.id] || params.id.replace(/_/g, ' ') + pageData.title = `${name} β€” ${label}` + pageData.description = `${label} ${name} in UnitsDB` + } + }, + + head: [ + ['link', { rel: 'icon', type: 'image/png', href: '/favicon-32x32.png', sizes: '32x32' }], + ['link', { rel: 'icon', type: 'image/svg+xml', href: '/favicon.svg' }], + ['link', { rel: 'shortcut icon', href: '/favicon.ico' }], + ['link', { rel: 'apple-touch-icon', sizes: '180x180', href: '/apple-touch-icon.png' }], + ['link', { rel: 'manifest', href: '/site.webmanifest' }], + ['meta', { name: 'theme-color', content: '#2d2c69' }], + ], + + vite: { + plugins: [asciidocPlugin()] + }, + + themeConfig: { + logo: { src: '/symbol.svg', height: 28 }, + siteTitle: 'UnitsML', + + nav: [ + { text: 'UnitsDB', link: '/unitsdb/' }, + { text: 'Schemas', link: '/schemas' }, + { + text: 'Learn', + items: [ + { text: 'What is UnitsML', link: '/learn/what-is-unitsml' }, + { text: 'Who is it for', link: '/learn/who-is-it-for' }, + { text: 'How it works', link: '/learn/how-it-works' }, + { text: 'Incorporating UnitsML', link: '/learn/incorporating-unitsml' }, + { text: 'Guide', link: '/learn/guide' }, + { text: 'Get Started', link: '/get-started' }, + ] + }, + { text: 'Software', link: '/software/' }, + { text: 'Blog', link: '/blog/' }, + { text: 'About', link: '/about' } + ], + + socialLinks: [ + { icon: 'github', link: 'https://github.com/unitsml' } + ], + + footer: { + message: `UnitsDB Β· Schemas Β· Learn Β· GitHub`, + copyright: 'Copyright Β© 2026 UnitsML Group' + }, + + search: { + provider: 'local' + }, + + sidebar: { + '/learn/': [ + { + text: 'Learn', + items: [ + { text: 'What is UnitsML', link: '/learn/what-is-unitsml' }, + { text: 'Who is it for', link: '/learn/who-is-it-for' }, + { text: 'How it works', link: '/learn/how-it-works' }, + { text: 'Incorporating UnitsML', link: '/learn/incorporating-unitsml' }, + { text: 'Guide', link: '/learn/guide' }, + ] + }, + { + text: 'Resources', + items: [ + { text: 'Get Started', link: '/get-started' }, + { text: 'Schemas', link: '/schemas' }, + ] + } + ], + '/software/': [ + { + text: 'Software', + items: [ + { text: 'Overview', link: '/software/' }, + { text: 'unitsdb-ruby', link: '/software/unitsdb-ruby' }, + { text: 'unitsml-ruby', link: '/software/unitsml-ruby' }, + ] + } + ], + '/schemas': [ + { + text: 'Schemas', + items: [ + { text: 'Overview', link: '/schemas' }, + { text: 'UnitsML XML Schemas', link: '/schemas#unitsml-xml-schemas' }, + { text: 'UnitsDB YAML Schemas', link: '/schemas#unitsdb-yaml-schemas' }, + ] + } + ], + '/get-started': [ + { + text: 'Getting Started', + items: [ + { text: 'Get Started', link: '/get-started' }, + ] + } + ], + '/about': [ + { + text: 'About', + items: [ + { text: 'About UnitsML', link: '/about' }, + { text: 'Privacy Policy', link: '/privacy' }, + { text: 'Terms of Service', link: '/tos' }, + ] + } + ], + }, + + outline: { + level: [2, 3] + }, + + editLink: { + pattern: 'https://github.com/unitsml/unitsml.github.io/edit/main/:path', + text: 'Edit this page on GitHub' + } + } +}) diff --git a/.vitepress/data/projects.ts b/.vitepress/data/projects.ts new file mode 100644 index 0000000..6994f0b --- /dev/null +++ b/.vitepress/data/projects.ts @@ -0,0 +1,29 @@ +export interface Project { + name: string + version: string + description: string + github: string + docs?: string + browse?: string + icon: string + category: string +} + +export const projects: Project[] = [ + { + name: 'unitsdb-ruby', + version: '', + description: 'A Ruby library for accessing and manipulating UnitsDB content β€” ships with bundled YAML data files.', + github: 'https://github.com/unitsml/unitsdb-ruby', + icon: 'πŸ’Ž', + category: 'Library' + }, + { + name: 'unitsml-ruby', + version: '', + description: 'Library to work with UnitsML in Ruby β€” parse unit expressions, generate MathML, and handle dimensional analysis.', + github: 'https://github.com/unitsml/unitsml-ruby', + icon: 'πŸ’Ž', + category: 'Library' + } +] diff --git a/.vitepress/plugins/asciidoc.ts b/.vitepress/plugins/asciidoc.ts new file mode 100644 index 0000000..2ae4dde --- /dev/null +++ b/.vitepress/plugins/asciidoc.ts @@ -0,0 +1,29 @@ +import Asciidoctor from '@asciidoctor/core' +import type { Plugin } from 'vite' + +const asciidoctor = Asciidoctor() + +export function asciidocPlugin(): Plugin { + return { + name: 'vite-plugin-asciidoc', + transform(code, id) { + if (!id.endsWith('.md')) return null + if (!code.includes('asciidoc: true')) return null + + const match = code.match(/^---\n([\s\S]*?)\n---\n([\s\S]*)$/) + if (!match) return null + + const [, frontmatter, body] = match + + const html = asciidoctor.convert(body, { + standalone: false, + attributes: { showtitle: false } + }) + + return { + code: `---\n${frontmatter}\n---\n\n${html}`, + map: null + } + } + } +} diff --git a/.vitepress/posts.data.ts b/.vitepress/posts.data.ts new file mode 100644 index 0000000..795f04e --- /dev/null +++ b/.vitepress/posts.data.ts @@ -0,0 +1,33 @@ +import { createContentLoader } from 'vitepress' + +interface Post { + title: string + url: string + date: string + authors: string[] + description: string + lastUpdated: number | undefined +} + +declare const data: Post[] +export { data } + +export default createContentLoader('blog/*.md', { + transform(raw): Post[] { + return raw + .filter((page) => !page.url.endsWith('/blog/')) + .map((page) => ({ + title: page.frontmatter.title, + url: page.url, + date: page.frontmatter.date, + authors: page.frontmatter.authors || [], + description: page.frontmatter.description || '', + lastUpdated: page.lastUpdated, + })) + .sort((a, b) => { + const dateA = new Date(a.date).getTime() + const dateB = new Date(b.date).getTime() + return dateB - dateA + }) + }, +}) diff --git a/.vitepress/theme/components/BlogByline.vue b/.vitepress/theme/components/BlogByline.vue new file mode 100644 index 0000000..430d768 --- /dev/null +++ b/.vitepress/theme/components/BlogByline.vue @@ -0,0 +1,137 @@ + + + + + diff --git a/.vitepress/theme/components/BlogIndex.vue b/.vitepress/theme/components/BlogIndex.vue new file mode 100644 index 0000000..a2ea283 --- /dev/null +++ b/.vitepress/theme/components/BlogIndex.vue @@ -0,0 +1,280 @@ + + + + + diff --git a/.vitepress/theme/components/DataModelDiagram.vue b/.vitepress/theme/components/DataModelDiagram.vue new file mode 100644 index 0000000..e76d935 --- /dev/null +++ b/.vitepress/theme/components/DataModelDiagram.vue @@ -0,0 +1,173 @@ + + + + + diff --git a/.vitepress/theme/components/EcosystemDiagram.vue b/.vitepress/theme/components/EcosystemDiagram.vue new file mode 100644 index 0000000..92de084 --- /dev/null +++ b/.vitepress/theme/components/EcosystemDiagram.vue @@ -0,0 +1,354 @@ + + + + + diff --git a/.vitepress/theme/components/FAQAccordion.vue b/.vitepress/theme/components/FAQAccordion.vue new file mode 100644 index 0000000..1d98cb3 --- /dev/null +++ b/.vitepress/theme/components/FAQAccordion.vue @@ -0,0 +1,213 @@ + + + + + diff --git a/.vitepress/theme/components/HomePage.vue b/.vitepress/theme/components/HomePage.vue new file mode 100644 index 0000000..b1068e7 --- /dev/null +++ b/.vitepress/theme/components/HomePage.vue @@ -0,0 +1,891 @@ + + + + + diff --git a/.vitepress/theme/components/NavScrollHandler.vue b/.vitepress/theme/components/NavScrollHandler.vue new file mode 100644 index 0000000..552ae9c --- /dev/null +++ b/.vitepress/theme/components/NavScrollHandler.vue @@ -0,0 +1,93 @@ + + + diff --git a/.vitepress/theme/components/PeopleGrid.vue b/.vitepress/theme/components/PeopleGrid.vue new file mode 100644 index 0000000..2e9f8df --- /dev/null +++ b/.vitepress/theme/components/PeopleGrid.vue @@ -0,0 +1,129 @@ + + + + + diff --git a/.vitepress/theme/components/TimelineSection.vue b/.vitepress/theme/components/TimelineSection.vue new file mode 100644 index 0000000..cb508ab --- /dev/null +++ b/.vitepress/theme/components/TimelineSection.vue @@ -0,0 +1,287 @@ + + + + + diff --git a/.vitepress/theme/components/UnitsDBBrowser.vue b/.vitepress/theme/components/UnitsDBBrowser.vue new file mode 100644 index 0000000..84af6d2 --- /dev/null +++ b/.vitepress/theme/components/UnitsDBBrowser.vue @@ -0,0 +1,521 @@ + + + + + diff --git a/.vitepress/theme/components/UnitsDBComposite.vue b/.vitepress/theme/components/UnitsDBComposite.vue new file mode 100644 index 0000000..36d5804 --- /dev/null +++ b/.vitepress/theme/components/UnitsDBComposite.vue @@ -0,0 +1,315 @@ + + + + + diff --git a/.vitepress/theme/components/UnitsDBDiagram.vue b/.vitepress/theme/components/UnitsDBDiagram.vue new file mode 100644 index 0000000..a8b9d03 --- /dev/null +++ b/.vitepress/theme/components/UnitsDBDiagram.vue @@ -0,0 +1,711 @@ + + + + + diff --git a/.vitepress/theme/components/UnitsDBEntityDetail.vue b/.vitepress/theme/components/UnitsDBEntityDetail.vue new file mode 100644 index 0000000..5ac51c4 --- /dev/null +++ b/.vitepress/theme/components/UnitsDBEntityDetail.vue @@ -0,0 +1,803 @@ + + + + + diff --git a/.vitepress/theme/custom.css b/.vitepress/theme/custom.css new file mode 100644 index 0000000..0454526 --- /dev/null +++ b/.vitepress/theme/custom.css @@ -0,0 +1,729 @@ +/* ========================================================================== + UnitsML Brand Theme + Navy: #2d2c69 | Teal: #30dfc0 | Blue: #57a0fe + ========================================================================== */ + +:root { + /* UnitsML Brand Colors */ + --unitsml-navy: #2d2c69; + --unitsml-navy-light: #46457a; + --unitsml-navy-dark: #1f1e4a; + --unitsml-teal: #30dfc0; + --unitsml-teal-light: #5eead4; + --unitsml-teal-dark: #14b8a6; + --unitsml-blue: #57a0fe; + + /* VitePress Brand Overrides */ + --vp-c-brand-1: var(--unitsml-navy); + --vp-c-brand-2: var(--unitsml-navy-light); + --vp-c-brand-3: var(--unitsml-navy-dark); + --vp-c-brand-soft: rgba(45, 44, 105, 0.10); + + /* Button */ + --vp-button-brand-border: transparent; + --vp-button-brand-text: #fff; + --vp-button-brand-bg: var(--unitsml-navy); + --vp-button-brand-hover-border: transparent; + --vp-button-brand-hover-text: #fff; + --vp-button-brand-hover-bg: var(--unitsml-navy-light); + --vp-button-brand-active-border: transparent; + --vp-button-brand-active-text: #fff; + --vp-button-brand-active-bg: var(--unitsml-navy-dark); + + /* Nav */ + --vp-nav-logo-height: 32px; +} + +/* Dark Mode */ +.dark { + --unitsml-navy: #6e6dba; + --unitsml-navy-light: #8a8acf; + --unitsml-navy-dark: #2d2c69; + + --vp-c-brand-1: #6e6dba; + --vp-c-brand-2: #8a8acf; + --vp-c-brand-3: #2d2c69; + --vp-c-brand-soft: rgba(110, 109, 186, 0.14); + + --vp-button-brand-bg: #6e6dba; + --vp-button-brand-hover-bg: #8a8acf; +} + +/* ========================================================================== + Typography + ========================================================================== */ + +:root { + --vp-font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', + Roboto, Oxygen, Ubuntu, Cantarell, 'Fira Sans', 'Droid Sans', + 'Helvetica Neue', sans-serif; +} + +/* ========================================================================== + Home Hero + ========================================================================== */ + +.home-hero { + padding: 6rem 2rem 4rem; + text-align: center; + position: relative; + overflow: hidden; +} + +.home-hero-logo { + max-width: 260px; + margin: 0 auto 3rem; + position: relative; + filter: drop-shadow(0 4px 12px rgba(45, 44, 105, 0.12)); +} + +.home-hero h1 { + font-size: 3.5rem; + font-weight: 700; + margin-bottom: 1.25rem; + letter-spacing: -0.03em; + line-height: 1.08; + color: var(--vp-c-text-1); + position: relative; +} + +.home-hero h1 .accent { + background: linear-gradient(135deg, var(--unitsml-navy) 0%, var(--unitsml-teal-dark) 100%); + -webkit-background-clip: text; + -webkit-text-fill-color: transparent; + background-clip: text; +} + +.home-hero .tagline { + font-size: 1.25rem; + color: var(--vp-c-text-2); + max-width: 640px; + margin: 0 auto 2.5rem; + line-height: 1.7; + position: relative; +} + +.home-hero-actions { + display: flex; + gap: 1rem; + justify-content: center; + flex-wrap: wrap; + position: relative; +} + +/* ========================================================================== + Buttons + ========================================================================== */ + +.btn { + display: inline-flex; + align-items: center; + gap: 0.5rem; + border: 1px solid transparent; + text-align: center; + font-weight: 600; + border-radius: 24px; + padding: 0.625rem 1.5rem; + font-size: 0.9375rem; + text-decoration: none; + transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1); + cursor: pointer; + line-height: 1.5; +} + +.btn-brand { + background: var(--unitsml-navy); + color: white !important; + box-shadow: 0 1px 3px rgba(45, 44, 105, 0.2); +} + +.btn-brand:hover { + background: var(--unitsml-navy-light); + box-shadow: 0 6px 20px rgba(45, 44, 105, 0.3); + transform: translateY(-1px); + color: white !important; +} + +.btn-brand svg { + stroke: white; +} + +.btn-teal { + background: var(--unitsml-teal); + color: var(--unitsml-navy-dark); + box-shadow: 0 1px 3px rgba(48, 223, 192, 0.2); +} + +.btn-teal:hover { + background: var(--unitsml-teal-light); + box-shadow: 0 6px 20px rgba(48, 223, 192, 0.3); + transform: translateY(-1px); + color: var(--unitsml-navy-dark); +} + +.btn-outline { + border-color: var(--vp-c-divider); + background: var(--vp-c-bg-soft); + color: var(--vp-c-text-1); +} + +.btn-outline:hover { + border-color: var(--unitsml-navy); + box-shadow: 0 2px 8px rgba(45, 44, 105, 0.1); + transform: translateY(-1px); +} + +/* ========================================================================== + Sections + ========================================================================== */ + +.section { + margin: 5rem 0; +} + +.section-header { + margin-bottom: 2.5rem; +} + +.section-header h2 { + font-size: 2rem; + font-weight: 700; + letter-spacing: -0.025em; + color: var(--vp-c-text-1); + margin-bottom: 0.5rem; +} + +.section-header p { + color: var(--vp-c-text-2); + font-size: 1.0625rem; + line-height: 1.6; +} + +.section-divider { + width: 48px; + height: 3px; + background: linear-gradient(90deg, var(--unitsml-teal), var(--unitsml-blue)); + border-radius: 2px; + margin-top: 1rem; +} + +/* ========================================================================== + Project Cards + ========================================================================== */ + +.projects-grid { + display: grid; + grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); + gap: 1.5rem; + margin: 2rem 0; +} + +.project-card { + background: var(--vp-c-bg-soft); + border: 1px solid var(--vp-c-divider); + border-radius: 16px; + padding: 2rem; + transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); + position: relative; + overflow: hidden; +} + +.project-card::before { + content: ''; + position: absolute; + top: 0; + left: 0; + right: 0; + height: 3px; + background: linear-gradient(90deg, var(--unitsml-teal), var(--unitsml-blue)); + opacity: 0; + transition: opacity 0.3s ease; +} + +.project-card:hover { + border-color: var(--unitsml-navy); + box-shadow: 0 8px 30px rgba(45, 44, 105, 0.10); + transform: translateY(-2px); +} + +.project-card:hover::before { + opacity: 1; +} + +.project-card.featured { + border-color: transparent; + background: linear-gradient( + 135deg, + var(--vp-c-bg-soft) 0%, + rgba(45, 44, 105, 0.03) 100% + ); + border: 1px solid rgba(45, 44, 105, 0.12); +} + +.project-card .card-icon { + width: 44px; + height: 44px; + border-radius: 12px; + display: flex; + align-items: center; + justify-content: center; + font-size: 1.375rem; + margin-bottom: 1.125rem; + background: linear-gradient(135deg, rgba(45, 44, 105, 0.08), rgba(87, 160, 254, 0.08)); + color: var(--unitsml-navy); +} + +.project-card h3 { + display: flex; + align-items: center; + gap: 0.5rem; + margin-bottom: 0.75rem; + color: var(--vp-c-text-1); + font-size: 1.125rem; + font-weight: 600; +} + +.project-card h3 .version { + font-size: 0.75rem; + font-weight: 500; + color: var(--vp-c-text-3); + background: var(--vp-c-default-soft); + padding: 0.125rem 0.5rem; + border-radius: 4px; +} + +.project-card .description { + color: var(--vp-c-text-2); + font-size: 0.9375rem; + margin-bottom: 1.5rem; + line-height: 1.7; +} + +.project-card .links { + display: flex; + gap: 0.75rem; + flex-wrap: wrap; +} + +.project-card .links a { + font-size: 0.875rem; + font-weight: 500; + padding: 0.375rem 1rem; + border-radius: 8px; + text-decoration: none; + transition: all 0.2s ease; +} + +.project-card .links a.primary { + background: var(--unitsml-navy); + color: white; +} + +.project-card .links a.primary:hover { + background: var(--unitsml-navy-light); +} + +.project-card .links a.secondary { + background: var(--vp-c-default-soft); + color: var(--vp-c-text-1); +} + +.project-card .links a.secondary:hover { + background: var(--vp-c-default-2); +} + +.project-card .links a.teal-link { + color: var(--unitsml-teal-dark); + background: rgba(48, 223, 192, 0.1); +} + +.project-card .links a.teal-link:hover { + background: rgba(48, 223, 192, 0.2); +} + +/* ========================================================================== + Features Grid + ========================================================================== */ + +.features-grid { + display: grid; + grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); + gap: 1.5rem; + margin: 2rem 0; +} + +.feature-card { + padding: 2rem; + background: var(--vp-c-bg-soft); + border-radius: 16px; + border: 1px solid var(--vp-c-divider); + transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); +} + +.feature-card:hover { + border-color: var(--unitsml-navy); + box-shadow: 0 8px 30px rgba(45, 44, 105, 0.08); + transform: translateY(-2px); +} + +.feature-card .feature-icon { + width: 48px; + height: 48px; + border-radius: 14px; + display: flex; + align-items: center; + justify-content: center; + font-size: 1.375rem; + margin-bottom: 1.25rem; + background: linear-gradient(135deg, rgba(48, 223, 192, 0.1), rgba(87, 160, 254, 0.1)); +} + +.feature-card h4 { + color: var(--vp-c-text-1); + margin-bottom: 0.5rem; + font-weight: 600; + font-size: 1.0625rem; +} + +.feature-card p { + color: var(--vp-c-text-2); + font-size: 0.9375rem; + line-height: 1.65; +} + +/* ========================================================================== + Schema Link Card + ========================================================================== */ + +.schema-card { + background: var(--unitsml-navy-dark); + border-radius: 20px; + padding: 2.5rem; + color: white; + position: relative; + overflow: hidden; +} + +.schema-card::after { + content: ''; + position: absolute; + top: -40%; + right: -15%; + width: 350px; + height: 350px; + background: radial-gradient(circle, rgba(48, 223, 192, 0.12) 0%, transparent 70%); + pointer-events: none; +} + +.schema-card::before { + content: ''; + position: absolute; + bottom: -30%; + left: -10%; + width: 250px; + height: 250px; + background: radial-gradient(circle, rgba(87, 160, 254, 0.08) 0%, transparent 70%); + pointer-events: none; +} + +.schema-card h3 { + color: white; + font-size: 1.5rem; + margin-bottom: 0.75rem; + font-weight: 700; +} + +.schema-card p { + color: rgba(255, 255, 255, 0.7); + font-size: 1rem; + line-height: 1.65; + margin-bottom: 1.5rem; +} + +.schema-card code { + color: var(--unitsml-teal-light); + background: rgba(255, 255, 255, 0.08); + padding: 0.125rem 0.5rem; + border-radius: 4px; + font-size: 0.875rem; +} + +.schema-card .schema-url { + background: rgba(255, 255, 255, 0.06); + border: 1px solid rgba(255, 255, 255, 0.1); + border-radius: 10px; + padding: 0.75rem 1rem; + display: inline-flex; + align-items: center; + gap: 0.5rem; +} + +/* ========================================================================== + Responsive + ========================================================================== */ + +@media (max-width: 768px) { + .home-hero { + padding: 4rem 1.5rem 3rem; + } + + .home-hero h1 { + font-size: 2.25rem; + } + + .home-hero .tagline { + font-size: 1.0625rem; + } + + .home-hero-logo { + max-width: 180px; + } + + .projects-grid { + grid-template-columns: 1fr; + } + + .section-header h2 { + font-size: 1.5rem; + } + + .schema-card { + padding: 1.5rem; + } +} + +@media (max-width: 640px) { + .home-hero-actions { + flex-direction: column; + align-items: center; + } + + .btn { + width: 100%; + justify-content: center; + } +} + +/* ========================================================================== + Animations & Motion + ========================================================================== */ + +@keyframes float { + 0%, 100% { transform: translateY(0) rotate(0deg); } + 50% { transform: translateY(-12px) rotate(3deg); } +} + +@keyframes float-delayed { + 0%, 100% { transform: translateY(0) rotate(0deg); } + 50% { transform: translateY(-8px) rotate(-2deg); } +} + +@keyframes pulse-glow { + 0%, 100% { opacity: 0.4; } + 50% { opacity: 0.8; } +} + +@keyframes fade-in-up { + from { opacity: 0; transform: translateY(20px); } + to { opacity: 1; transform: translateY(0); } +} + +@keyframes dash-flow { + to { stroke-dashoffset: -24; } +} + +@keyframes shimmer { + 0% { background-position: -200% 0; } + 100% { background-position: 200% 0; } +} + +@keyframes gentle-spin { + from { transform: rotate(0deg); } + to { transform: rotate(360deg); } +} + +/* Smooth scrolling */ +html { + scroll-behavior: smooth; +} + +/* Transition for dark mode toggle */ +.vp-doc, .VPSidebar, .VPNav, .VPFooter { + transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease; +} + +/* ========================================================================== + VitePress Overrides + ========================================================================== */ + +.vp-doc .custom-block.tip { + border-color: var(--unitsml-teal); +} + +.vp-doc h1 { + letter-spacing: -0.025em; +} + +.vp-doc h2 { + letter-spacing: -0.02em; + border-top: 1px solid var(--vp-c-divider); + padding-top: 2rem; + margin-top: 3rem; +} + +.vp-doc h2:first-of-type { + border-top: none; + padding-top: 0; + margin-top: 2rem; +} + +.VPFooter { + border-top: 1px solid var(--vp-c-divider) !important; +} + +/* ========================================================================== + Nav Logo + ========================================================================== */ + +.VPNavBarTitle .title { + font-size: 1rem; + font-weight: 700; + letter-spacing: -0.02em; +} + +.VPNavBarTitle .VPImage { + transition: transform 0.3s ease; +} + +.VPNavBarTitle:hover .VPImage { + transform: scale(1.05); +} + +/* Nav logo visibility transitions (controlled by NavScrollHandler) */ +/* The hero logo scrolls up naturally; the nav logo slides up from + below into its resting position as the hero scrolls past. */ + +/* Always define transitions so they apply on the first class change */ +.VPNavBarTitle { + transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1), + transform 0.5s cubic-bezier(0.4, 0, 0.2, 1) !important; + will-change: opacity, transform; +} + +/* Disable transitions during initial paint to prevent flash */ +.no-transition .VPNavBarTitle { + transition: none !important; +} + +.home-logo-hidden .VPNavBarTitle { + opacity: 0 !important; + transform: translateY(12px) !important; + pointer-events: none; +} + +.home-logo-visible .VPNavBarTitle { + opacity: 1 !important; + transform: translateY(0) !important; + pointer-events: auto; +} + +/* ========================================================================== + Subtle Page-level Enhancements + ========================================================================== */ + +/* Top-level doc pages: add a faint left accent line */ +.vp-doc > div > h1::before { + content: ''; + display: inline-block; + width: 4px; + height: 1.5em; + background: linear-gradient(180deg, var(--unitsml-teal), var(--unitsml-blue)); + border-radius: 2px; + margin-right: 0.75rem; + vertical-align: middle; +} + +/* ========================================================================== + Section Reveal Animation + ========================================================================== */ + +.section[data-revealed] { + animation: fade-in-up 0.6s ease-out both; +} + +.section[data-reveal-delay="1"] { animation-delay: 0.1s; } +.section[data-reveal-delay="2"] { animation-delay: 0.2s; } +.section[data-reveal-delay="3"] { animation-delay: 0.3s; } + +/* ========================================================================== + Interactive Tooltip + ========================================================================== */ + +.tooltip { + position: relative; +} + +.tooltip::after { + content: attr(data-tooltip); + position: absolute; + bottom: calc(100% + 8px); + left: 50%; + transform: translateX(-50%) scale(0.95); + background: var(--unitsml-navy-dark); + color: white; + padding: 0.5rem 0.75rem; + border-radius: 8px; + font-size: 0.75rem; + line-height: 1.4; + white-space: nowrap; + opacity: 0; + pointer-events: none; + transition: all 0.2s ease; + z-index: 10; + max-width: 240px; + white-space: normal; + text-align: center; + box-shadow: 0 4px 12px rgba(0,0,0,0.15); +} + +.tooltip:hover::after { + opacity: 1; + transform: translateX(-50%) scale(1); +} + +/* ========================================================================== + UnitsDB Full-Width App Page + ========================================================================== */ + +.unitsdb-full .VPSidebar { + display: none !important; +} + +.unitsdb-full .VPContent { + padding-left: 0 !important; +} + +.unitsdb-full .VPDoc .container { + max-width: unset !important; +} + +.unitsdb-full .VPDoc .content-container { + max-width: unset !important; + padding: 0 !important; +} + +.unitsdb-full .VPDoc .aside { + display: none !important; +} + +.unitsdb-full .VPDoc > .content { + padding: 0 !important; +} + +.unitsdb-full .VPDoc { + padding: 0 !important; +} + +.unitsdb-full .vp-doc > div > h1 { + display: none; +} diff --git a/.vitepress/theme/index.ts b/.vitepress/theme/index.ts new file mode 100644 index 0000000..373290f --- /dev/null +++ b/.vitepress/theme/index.ts @@ -0,0 +1,39 @@ +import DefaultTheme from 'vitepress/theme' +import './custom.css' +import HomePage from './components/HomePage.vue' +import BlogIndex from './components/BlogIndex.vue' +import BlogByline from './components/BlogByline.vue' +import EcosystemDiagram from './components/EcosystemDiagram.vue' +import DataModelDiagram from './components/DataModelDiagram.vue' +import UnitsDBDiagram from './components/UnitsDBDiagram.vue' +import UnitsDBComposite from './components/UnitsDBComposite.vue' +import UnitsDBBrowser from './components/UnitsDBBrowser.vue' +import UnitsDBEntityDetail from './components/UnitsDBEntityDetail.vue' +import TimelineSection from './components/TimelineSection.vue' +import PeopleGrid from './components/PeopleGrid.vue' +import FAQAccordion from './components/FAQAccordion.vue' +import NavScrollHandler from './components/NavScrollHandler.vue' +import { h } from 'vue' + +export default { + extends: DefaultTheme, + Layout() { + return h(DefaultTheme.Layout, null, { + 'layout-top': () => h(NavScrollHandler) + }) + }, + enhanceApp({ app }) { + app.component('HomePage', HomePage) + app.component('BlogIndex', BlogIndex) + app.component('BlogByline', BlogByline) + app.component('EcosystemDiagram', EcosystemDiagram) + app.component('DataModelDiagram', DataModelDiagram) + app.component('UnitsDBDiagram', UnitsDBDiagram) + app.component('UnitsDBComposite', UnitsDBComposite) + app.component('UnitsDBBrowser', UnitsDBBrowser) + app.component('UnitsDBEntityDetail', UnitsDBEntityDetail) + app.component('TimelineSection', TimelineSection) + app.component('PeopleGrid', PeopleGrid) + app.component('FAQAccordion', FAQAccordion) + } +} diff --git a/404.html b/404.html deleted file mode 100644 index c472b4e..0000000 --- a/404.html +++ /dev/null @@ -1,24 +0,0 @@ ---- -layout: default ---- - - - -
-

404

- -

Page not found :(

-

The requested page could not be found.

-
diff --git a/CLAUDE.md b/CLAUDE.md new file mode 100644 index 0000000..8d5ba76 --- /dev/null +++ b/CLAUDE.md @@ -0,0 +1,60 @@ +# CLAUDE.md + +This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository. + +## Project Overview + +UnitsML.org is the official website for the UnitsML project β€” an authoritative mechanism for encoding scientific units of measure. The site is built with **VitePress**, deployed to **GitHub Pages**. + +Content is authored in **Markdown** (`.md` files). Blog posts can optionally use **AsciiDoc** by adding `asciidoc: true` to frontmatter (a Vite plugin converts the body via asciidoctor.js). + +## Commands + +```bash +# Install dependencies +npm install + +# Local dev server (hot reload) +npm run dev + +# Production build +npm run build + +# Preview production build locally +npm run preview +``` + +## Architecture + +- **VitePress** static site generator with custom theme extending the default VitePress theme. +- **Brand colors**: navy `#2d2c69`, teal `#30dfc0`, blue `#57a0fe` β€” defined in `.vitepress/theme/custom.css`. +- **Custom Vue components** in `.vitepress/theme/components/`: + - `HomePage.vue` β€” landing page with hero, stats, ecosystem diagram, how-it-works steps, software cards, features, schema CTA + - `EcosystemDiagram.vue` β€” interactive SVG diagram showing UnitsML components and relationships + - `TimelineSection.vue` β€” collapsible history timeline (1998–2022) with people and organizations + - `PeopleGrid.vue` β€” contributor cards with roles, affiliations, and eras + - `FAQAccordion.vue` β€” grouped FAQ with collapsible accordion (General, Integration, UnitsDB) + - `BlogIndex.vue` β€” blog listing with card layout + - `BlogByline.vue` β€” author/date byline for blog posts +- **Data layer** in `.vitepress/data/projects.ts` β€” software project definitions used by HomePage and Software page. +- **Blog post loader** in `.vitepress/posts.data.ts` β€” uses VitePress `createContentLoader` to index `blog/*.md`. +- **AsciiDoc plugin** in `.vitepress/plugins/asciidoc.ts` β€” Vite plugin that converts `.md` files with `asciidoc: true` frontmatter through asciidoctor.js. +- **Public assets** in `public/` β€” favicons, logos (`symbol.svg`, `logo-text.svg`), `ref-docs/` (PDFs). + +## CI/CD + +- **`.github/workflows/build_deploy.yml`** β€” Node 24 + VitePress build, deploys to GitHub Pages on push to `main`. +- **`.github/workflows/links.yml`** β€” lychee link checker against the built site. +- `lychee.toml` β€” link checker configuration with exclusions. + +## Content Structure + +- `index.md` β€” Home page (uses `` component) +- `about.md` β€” Rich about page with ecosystem diagram, governance, timeline, people grid, organizations +- `faq.md` β€” FAQ with accordion component +- `privacy.md`, `tos.md` β€” standalone pages +- `software/index.md` β€” Software listing with ecosystem diagram and project cards +- `software/schemas.md`, `software/unitsdb.md`, `software/unitsml-ruby.md` β€” individual software pages +- `specs/guidelines.md` β€” specifications page +- `blog/index.md` β€” Blog listing (uses `` component) +- `blog/*.md` β€” individual blog posts (frontmatter: title, date, authors, description) diff --git a/Gemfile b/Gemfile deleted file mode 100644 index 6bb67e6..0000000 --- a/Gemfile +++ /dev/null @@ -1,45 +0,0 @@ -source "https://rubygems.org" - -# Hello! This is where you manage which Jekyll version is used to run. -# When you want to use a different version, change it below, save the -# file and run `bundle install`. Run Jekyll with `bundle exec`, like so: -# -# bundle exec jekyll serve -# -# This will help ensure the proper Jekyll version is running. -# Happy Jekylling! -gem "jekyll" - -# This is the default theme for new Jekyll sites. You may change this to anything you like. - -# If you want to use GitHub Pages, remove the "gem "jekyll"" above and -# uncomment the line below. To upgrade, run `bundle update github-pages`. -# gem "github-pages", group: :jekyll_plugins -# gem "jekyll-theme-open-project", path: "~/src/jekyll-theme-open-project" -gem "jekyll-theme-open-project", "~> 2.1.11" - -# If you have any plugins, put them here! -group :jekyll_plugins do - gem "jekyll-seo-tag" - gem "jekyll-sitemap" - gem "jekyll-data" - gem "jekyll-asciidoc" - gem "jekyll-redirect-from" - gem "jekyll-inline-svg" - gem "git" - gem "jekyll-theme-open-project-helpers" - gem "kramdown-parser-gfm" - gem "kramdown-syntax-coderay" -end - -# Windows does not include zoneinfo files, so bundle the tzinfo-data gem -gem "tzinfo-data", platforms: [:mingw, :mswin, :x64_mingw, :jruby] - -# Performance-booster for watching directories on Windows -gem "wdm", "~> 0.1.0" if Gem.win_platform? - -# For testing generated HTML pages and links -gem "rake" -gem "html-proofer" - -gem "webrick", "~> 1.7" diff --git a/Gemfile.lock b/Gemfile.lock deleted file mode 100644 index 1c67df8..0000000 --- a/Gemfile.lock +++ /dev/null @@ -1,140 +0,0 @@ -GEM - remote: https://rubygems.org/ - specs: - addressable (2.8.0) - public_suffix (>= 2.0.2, < 5.0) - asciidoctor (2.0.17) - coderay (1.1.3) - colorator (1.1.0) - concurrent-ruby (1.1.10) - em-websocket (0.5.3) - eventmachine (>= 0.12.9) - http_parser.rb (~> 0) - ethon (0.15.0) - ffi (>= 1.15.0) - eventmachine (1.2.7) - fastimage (2.1.7) - ffi (1.15.5) - forwardable-extended (2.6.0) - git (1.11.0) - rchardet (~> 1.8) - html-proofer (3.19.4) - addressable (~> 2.3) - mercenary (~> 0.3) - nokogiri (~> 1.13) - parallel (~> 1.10) - rainbow (~> 3.0) - typhoeus (~> 1.3) - yell (~> 2.0) - http_parser.rb (0.8.0) - i18n (1.10.0) - concurrent-ruby (~> 1.0) - jekyll (4.2.2) - addressable (~> 2.4) - colorator (~> 1.0) - em-websocket (~> 0.5) - i18n (~> 1.0) - jekyll-sass-converter (~> 2.0) - jekyll-watch (~> 2.0) - kramdown (~> 2.3) - kramdown-parser-gfm (~> 1.0) - liquid (~> 4.0) - mercenary (~> 0.4.0) - pathutil (~> 0.9) - rouge (~> 3.0) - safe_yaml (~> 1.0) - terminal-table (~> 2.0) - jekyll-asciidoc (3.0.0) - asciidoctor (>= 1.5.0) - jekyll (>= 3.0.0) - jekyll-data (1.1.1) - jekyll (>= 3.3, < 5.0.0) - jekyll-inline-svg (1.1.4) - jekyll (>= 3.3, < 5.0) - svg_optimizer (~> 0.2.5) - jekyll-redirect-from (0.16.0) - jekyll (>= 3.3, < 5.0) - jekyll-sass-converter (2.2.0) - sassc (> 2.0.1, < 3.0) - jekyll-seo-tag (2.8.0) - jekyll (>= 3.8, < 5.0) - jekyll-sitemap (1.4.0) - jekyll (>= 3.7, < 5.0) - jekyll-theme-open-project (2.1.11) - git (~> 1.4) - jekyll (~> 4.1) - jekyll-data (~> 1.0) - jekyll-seo-tag (~> 2.0) - jekyll-theme-open-project-helpers (= 2.1.8) - jekyll-theme-open-project-helpers (2.1.8) - fastimage (~> 2.1.4) - git (~> 1.4) - jekyll (~> 4.0) - jekyll-watch (2.2.1) - listen (~> 3.0) - kramdown (2.4.0) - rexml - kramdown-parser-gfm (1.1.0) - kramdown (~> 2.0) - kramdown-syntax-coderay (1.0.1) - coderay (~> 1.1) - kramdown (~> 2.0) - liquid (4.0.3) - listen (3.7.1) - rb-fsevent (~> 0.10, >= 0.10.3) - rb-inotify (~> 0.9, >= 0.9.10) - mercenary (0.4.0) - nokogiri (1.13.6-arm64-darwin) - racc (~> 1.4) - nokogiri (1.13.6-x86_64-linux) - racc (~> 1.4) - parallel (1.22.1) - pathutil (0.16.2) - forwardable-extended (~> 2.6) - public_suffix (4.0.7) - racc (1.6.0) - rainbow (3.1.1) - rake (13.0.6) - rb-fsevent (0.11.1) - rb-inotify (0.10.1) - ffi (~> 1.0) - rchardet (1.8.0) - rexml (3.2.5) - rouge (3.29.0) - safe_yaml (1.0.5) - sassc (2.4.0) - ffi (~> 1.9) - svg_optimizer (0.2.6) - nokogiri - terminal-table (2.0.0) - unicode-display_width (~> 1.1, >= 1.1.1) - typhoeus (1.4.0) - ethon (>= 0.9.0) - unicode-display_width (1.8.0) - webrick (1.7.0) - yell (2.2.2) - -PLATFORMS - arm64-darwin-20 - x86_64-linux - -DEPENDENCIES - git - html-proofer - jekyll - jekyll-asciidoc - jekyll-data - jekyll-inline-svg - jekyll-redirect-from - jekyll-seo-tag - jekyll-sitemap - jekyll-theme-open-project (~> 2.1.11) - jekyll-theme-open-project-helpers - kramdown-parser-gfm - kramdown-syntax-coderay - rake - tzinfo-data - webrick (~> 1.7) - -BUNDLED WITH - 2.3.8 diff --git a/Makefile b/Makefile deleted file mode 100644 index 8108bd7..0000000 --- a/Makefile +++ /dev/null @@ -1,18 +0,0 @@ -SHELL := /bin/bash - -all: _site - -clean: - bundle exec jekyll clean - rm -rf _site _software/*/.git _software/*/docs _software/*/_*_repo - -bundle: - bundle - -_site: - bundle exec jekyll build --trace - -serve: - bundle exec jekyll serve --trace - -.PHONY: bundle all open serve clean diff --git a/README.adoc b/README.adoc deleted file mode 100644 index 18fbbe6..0000000 --- a/README.adoc +++ /dev/null @@ -1,129 +0,0 @@ -= UnitsML official site - -== Introduction - -This is the site for the UnitsML project, located at -https://www.unitsml.org. - -It is a https://jekyllrb.com[Jekyll]-based site created with the Open Project Jekyll theme. - -Refer to their respective docs for details. - -== Content management - -Unlike other sections, this section targets site author -who does not necessarily have a software engineering background. - -NOTE: This documentation covers macOS or Ubuntu Linux. - -=== Overview - -Content management workflow involves the following phases: - -. Authoring: changing the contents of the repository. - You’ll manipulate AsciiDoc files (`.adoc` file extension) - and related files such as illustrations. - -. Previewing your changes (optional): - building and previewing the new version of the site locally without publishing. - (This is not a strict requirement at early stages, - you can skip straight to the next step and see your changes live. - However, setting up for this step is beneficial since it allows you - to preview your changes quicker.) - -. Version management: relaying your changes to upstream repository. - This means others will see your changes. - This also will cause the new version of the site to be published. - (Publishing the new version may take a few minutes.) - -=== Setup - -==== Pre-requisites - -Make sure you have the installed: - -- A text editor - (you can use a simple editor like CotEditor on macOS or Notepad+ on Windows, - or something more complex like VS Code with support for AsciiDoc preview) -- Git CLI - -=== Authoring - -Key sections are documentation pages (the largest) and news/blog posts. -Apart from that there can be other standalone pages. - -[NOTE] --- -You will be authoring site source using **AsciiDoc syntax**. -With AsciiDoc, your write plain text, and the result is rendered as HTML on the public site later. -Check out https://docs.asciidoctor.org/asciidoc/latest/syntax-quick-reference/ -for a quick reference. -AsciiDoc is contained in `.adoc` files. - -Most site source files (`.adoc` and otherwise) have _frontmatter_ -at the beginning, inbetween the `---` delimitersβ€”that frontmatter. -That frontmatter must specify the correct layout (see below) -and your page’s title. -After the frontmatter block, normal content (AsciiDoc, HTML, etc.) begins. --- - -==== Documentation - -Documentation lives under the `/docs/` directory. -All documentation source pages therein must specify `layout: docs` in frontmatter. - -The structure of the directory is reflected in the structure of URLs. -For example, file `/docs/section-1/test-page.adoc` will be available under `ap210.org/docs/section-1/test-page/`. - -===== Navigation sidebar - -Documentation requires manual update when you add pages, retitle them -or move them around. - -Navigation across the docs lives _separately from documentation files_: -you can find it under `/_layouts/docs.html`. - -The YAML frontmatter of that file (between `---` delimiters`) contains -a key `navigation`, under which documentation structure is described. -The sidebar is generated from this structure. - -===== The Deliverables page - -That page (currently `/docs/section-1/deliverables.adoc`) -is a special in that it contains code that initializes a _deliverable browser_. -Regarding that page, feel free to add text before - -==== Posts - -Blog/news roll posts reside under `/_posts/` directory. -See the existing post for frontmatter example. - -==== Other pages - -(Section to be completed.) - -== Previewing site locally - -=== Getting started - -. Ensure you have reasonable Ruby version (2.7.5 is recommended). - Use rbenv to manage Ruby versions. - -. Run `bundle` from within site directory to install Ruby dependencies. - -=== Building & serving - -Run `jekyll serve` from within site directory. - -Alternatively, build to HTML and serve separately -with `jekyll build && cd _site && python3 -m http.server`. - -To troubleshoot errors, append ` --trace` to build or serve command. - -== Development workflow - -. Ensure site builds and works normally, tests pass -. Create your feature branch (`git checkout -b my-new-feature`) -. Commit your changes (`git commit -am 'Add some feature'`) -. Push to the branch (`git push origin my-new-feature`) -. Make a pull request diff --git a/Rakefile b/Rakefile deleted file mode 100644 index f474433..0000000 --- a/Rakefile +++ /dev/null @@ -1,86 +0,0 @@ -require 'html-proofer' - -$sourceDir = "./source" -$outputDir = "./_site" -$testOpts = { - allow_hash_href: true, - assume_extension: true -} - -hostname = ENV['SITE_HOSTNAME'] -region = ENV['SITE_REGION'] - -task :default => ["serve:development"] - -desc "cleans the output directory" -task :clean do - sh "jekyll clean" -end - -namespace :deploy do - - desc "upload to S3" - task :s3upload => [] do - bucket = `aws s3api list-buckets --query "Buckets[?contains(Name, '#{hostname}')] | [0].Name" | jq -r '.'` - - p "Uploading to #{bucket} in #{region}" - - htmls = File.join("**", "*.html") - - # Remove extension from HTML files - Dir.glob(htmls, base: "_site") do |filename| - # Skip index.html - next if filename == "index.html" - - filename_noext = filename.sub('.html', '') - p "Will move #{filename} to #{filename_noext}" - FileUtils.mv(filename, filename_noext) - end - - p "Will upload non-HTML files" - sh %{ - aws s3 sync _site/ s3://#{bucket} --region #{region} --delete \ - --size-only --exclude "*" --include "*.*" - } - - p "Will upload HTML files" - sh %{ - aws s3 sync _site/ s3://#{bucket} --region #{region} --delete \ - --content-type "text/html; charset=utf-8" --exclude "*.*" - } - end -end - -namespace :build do - - desc "build development site" - task :development => [:clean] do - sh "jekyll build --drafts" - end - - desc "build production site" - task :production => [:clean] do - sh "JEKYLL_ENV=production jekyll build --config=_config.yml" - end -end - -namespace :serve do - - desc "serve development site" - task :development => [:clean] do - sh "jekyll serve --drafts" - end - - desc "serve production site" - task :production => [:clean] do - sh "JEKYLL_ENV=production jekyll serve --config=_config.yml" - end -end - -namespace :test do - - desc "test production build" - task :production => ["build:production"] do - HTMLProofer.check_directory($outputDir, $testOpts).run - end -end diff --git a/_config.yml b/_config.yml deleted file mode 100644 index 486161b..0000000 --- a/_config.yml +++ /dev/null @@ -1,122 +0,0 @@ -title: UnitsML -description: UnitsML is the authoritative mechanism for encoding scientific units of measure. - - -permalink: /blog/:year-:month-:day-:title/ - -seo: - type: Organization - -url: https://www.unitsml.org - -github_repo_url: https://github.com/unitsml/unitsml.org -github_repo_branch: master - -algolia_search: - api_key: 'test' - index_name: 'unitsml' - -landing_priority: [custom_intro, software, specs] - -theme: jekyll-theme-open-project - -author: - name: UnitsML - url: https://www.unitsml.org - -authors: - - name: UnitsML - email: info@unitsml.org - -contact_email: info@unitsml.org - -theme: jekyll-theme-open-project - -includes_dir: . - -extra_footer_links: - - { url: "/about/", title: "About UnitsML" } - - { url: "/faq/", title: "Frequently Asked Questions" } - - { url: "https://schema.unitsml.org/", title: "XML Schemas" } - -social: - links: - - https://github.com/unitsml - -legal: - name: UnitsML group - tos_link: /tos - privacy_policy_link: /privacy - -collections: - # Temporary fix - projects: - output: true - software: - output: true - permalink: /software/:path/ - specs: - output: true - permalink: /specs/:path/ - posts: - output: true - permalink: /blog/:year-:month-:day-:title/ - pages: - output: true - permalink: /:name/ - - -defaults: - # Theme defaults. - # MUST be duplicated from theme’s _config.yml - # (does not get inherited, unlike the collections hash) - - scope: - path: "" - values: - layout: default - - scope: - path: _posts - type: posts - values: - layout: post - - scope: - path: _software - type: software - values: - layout: product - - scope: - path: _specs - type: specs - values: - layout: spec - -plugins: - - jekyll-seo-tag - - jekyll-sitemap - - jekyll-inline-svg - -tag_namespaces: - software: - writtenin: "Written in" - bindingsfor: "Bindings for" - user: "Target user" - interface: "Interface" - specs: - audience: "Audience" - completion_status: "Status" - -exclude: - - .git - - .lycheeignore - - "*/.git" - - _software/*/.git - - _specs/*/.git - - Gemfile* - - Makefile - - Rakefile - - README.adoc - - vendor # for deployment - -svg: - optimize: true - diff --git a/_pages/about.adoc b/_pages/about.adoc deleted file mode 100644 index ba7b13a..0000000 --- a/_pages/about.adoc +++ /dev/null @@ -1,64 +0,0 @@ ---- -layout: docs-base -html-class: docs-page -title: About UnitsML ---- -:page-liquid: - -UnitsML is the authoritative mechanism for encoding scientific units of measure. -The UnitsML suite of technologies is developed by CalConnect's TC UNITS. - -NOTE: UnitsML is under active development and its documentation may change frequently. - -UnitsML consists of two main parts: - -* link:/software/schemas/[UnitsML XML], a way to encode scientific units of measure, -such as SI units, their derivatives and non-SI units; -* link:/software/unitsdb/[UnitsDB] (Units Database), a database containing extensive -information on units, prefixes, quantities and dimensions. - -== Vision - -* XML schema(s) available for incorporating UnitsML into XML -documents for encoding scientific units of measure. - -* Extensive XML repository containing schemas and -information on units, quantities, prefixes. - -* Design of schemas and repository to facilitate unit -information processing: - -** validating documents for self-consistent usage of units, -quantities, and prefixes - -** unit conversion and manipulation - -== History - -=== 1998 - -* Frank Olken and John McCarthy of the https://www.lbl.gov/[Lawrence Berkeley National Laboratory] (LBNL) led the https://www.w3.org/TandS/QL/QL98/pp/xml.ql.reqs.html[initial effort of encoding units in XML]. This work is also referred by https://www.w3.org/TandS/QL/QL98/pp/xml.ql.reqs.html[β€œRequirements and Desiderata for an XML Query Language”]. - -=== 1999 - -* http://xml.coverpages.org/OlkenMeasurementUnitsSyntax.html[β€œMeasurement Units in XML Datatypes”] was published by Olken and McCarthy at LBNL. - -* http://xml.coverpages.org/measurementUnits.html[MatML (Materials Markup Language)] which referred to the measurement units work, was published by NIST. - -=== 2003 - -* The β€œUnits Markup Language (UnitsML)” presentation was given at the http://xml.coverpages.org/ni2002-05-02-b.html[Open Forum 2003 on Metadata Registries], with work led by Bob Dragoset of NIST. Collaborators included Barry Taylor (NIST emeritus), Michael McLay (NIST EEEL), Frank Olken (LBNL) and Peter Murray-Rust (http://www.xml-cml.org/[CMLβ€”Chemical Markup Language]). The work was funded in part by NIST’s Systems Integration for Manufacturing Applications (SIMA) program. - -=== 2006 - -* The UnitsML work was proposed by the NIST Physics Laboratory (PL, now the https://www.nist.gov/pml[Physical Measurement Laboratory]) to be standardized, and was inducted into a new OASIS TC of the same name β€œUnitsML” sponsored by NIST. The Convenor of the TC was Simon Frechette (NIST MEL-SIMA). Collaborators included Mark Carlisle (NIST MEL-SIMA), Bob Dragoset (NIST PL), Karen Olsen (NIST PL), Gary Kramer (NIST CSTL), Peter Lindstrom (NIST CSTL), Kent Reed (NIST BFRL), Evan Wallace (NIST MEL), Ismet Celebi, Ronny Jopp and Alexander Roth. - -* The UnitsML TC at OASIS includes participants from https://www.nist.gov/[NIST], https://www.grantadesign.com/[Granta Design], LSC Group Ltd (now https://www.babcockinternational.com/[Babcock]), https://www.ibm.com/[IBM], NPL, https://www.unf.edu/[Univ. of North Florida], IEM. - -=== 2016 - -* The OASIS TC for UnitsML was closed due to completion of work at that stage. - -=== 2020β€” - -* UnitsML work continues! diff --git a/_pages/blog.html b/_pages/blog.html deleted file mode 100644 index 5d67fc1..0000000 --- a/_pages/blog.html +++ /dev/null @@ -1,6 +0,0 @@ ---- -title: Blog -description: The UnitsML blog -layout: blog-index -hero_include: index-page-hero.html ---- diff --git a/_pages/faq.adoc b/_pages/faq.adoc deleted file mode 100644 index 50ff2ae..0000000 --- a/_pages/faq.adoc +++ /dev/null @@ -1,141 +0,0 @@ ---- -layout: docs-base -html-class: docs-page -title: Frequently Asked Questions about UnitsML -docs_title: FAQ # Why does it have no effect -navigation: - base_url: /faq - items: - - title: Questions - path: / ---- - -== Standardization effort - -=== What is the rationale behind this standardization effort? What is the motivation of the sponsors/authors? - -The rationalization of this standard effort is to create a -schema for representing scientific units of measure that -can be easily incorporated into other markup languages, -thus improving interoperability between different markup -languages. There were numerous requests that the National -Institute of Standards and Technology address this issue -since NIST is responsible for interpreting the -International System of Units (SI) for use in the U.S. - - -=== What is the scope of this effort? What is explicitly out-of-scope, and why? - -The TC will develop and publish an XML-based specification -that will enable the unambiguous representation of units -of measure. This effort will not include the following -items: 1) the design of the Units database (UnitsDB) being -developed at NIST, except in so far as the design relates -directly to the UnitsML schema; 2) the generation of -codes/symbols that represent units of measure; and 3) -related properties needed for a complete representation of -numerical values, such as uncertainty. - - -=== Are there existing comparable or overlapping standards, or comparable standardization efforts currently under way? How does the work of this technical committee relate to these? What distinguishes this TC from similar work? How do the differences add value? (TODO) - - -=== Is the product of this technical committee intended to be used in conjunction with other standards or complementary technologies? - -UnitsML is explicitly intended to be used as a component -in the construction of other markup languages and / or -information systems which require information on units of -measure. This can generally be done in two ways: - -. Other markup languages can incorporate UnitsML to -provide the markup needed to define and refer to -units of measure. This will benefit developers of -such markup languages by providing ready-made -markup for units of measure. It will benefit users -of such languages by providing better -interoperability among languages that use UnitsML. - -. Other markup languages or information systems can -refer to definitions of units which are marked up -in UnitsML even if they do not use UnitsML to -denote units of measure. For example, a system may -use a code list to define units of measure. The -units corresponding to these codes (and the codes -themselves) could then be marked up in UnitsML. In -this manner UnitsML is complimentary to efforts to -provide standardized unit codes; it provides a -mechanism to mark up such codes and the units they -represent. - -==== What are these? - -UnitsML may be used with any markup language or -system which has data that contains units of -measure. Such data can be found in many -applications in commerce, engineering, and -science. Examples of such applications include -management of laboratory data, geographical -information systems, and commerce which is based -on physical properties of the product being sold. - -==== How does this work relate to these (is the usage of these complements mandatory? optional? restricted or profiled?) - -Use of UnitsML is completely optional. In many -cases, existing systems have already developed -domain specific markup or codes for handling -units, and it is probably not practical to convert -such systems to use UnitsML. The advantages of -UnitsML (ready-made markup for units, improved -interoperability), however, should provide a -compelling case for its use in new projects. - - -=== What is an example of a concrete application that will benefit from standardizing the specifications from this TC? - -This standard will greatly improve the ability to reliably exchange scientific data. This would be particularly useful in areas where scientific data is exchanged between different disciplines or business sectors. Specific examples include reliably interpreting scientific data from 1) disparate sources during emergency situations, and 2) technical specifications that accompany products in the manufacturing supply chain. - -=== Is it anticipated that TC deliverables will be broadly used, deployed, and/or implemented? Or are the deliverables intended for a narrow audience, possibly including only the TC membership? - -The use of units of measure is pervasive. UnitsML could be -used by most developers of markup languages that include -units of measure and it is anticipated that it will be -broadly implemented. - - -=== What are the security implications, if any, of this effort? - -There are no known security implications for this effort. - - -== UnitsML and UnitsDB - -=== How might UnitsML be used? - -UnitsML has been designed primarily to be a component for inclusion into other markup languages. There are several different ways to incorporate UnitsML into other markup languages: referencing the schema, including the schema, importing the schema, and redefining the schema elements. For more information, see http://dx.doi.org/10.6028/jres.115.003[Improving Interoperability by Incorporating UnitsML into Markup Languages]. - -=== What is UnitsDB? - -UnitsDB is a database under development at NIST that will -contain extensive information on scientific units of -measure. The output of the database will be in UnitsML and -HTML, with both human and Web Services interfaces. - - -=== What is the relationship between UnitsML (the schema) and UnitsDB? - -In addition to HTML output, another output format for -UnitsDB is UnitsML. However, the UnitsML schema (under -development in the OASIS TC) will also be incorporated -into other markup languages in order to handle units of -measure. There is a possibility that the OASIS TC will -change the UnitsML schema such that it will no longer be -used as the XML output format for UnitsDB. - - -=== Is UnitsML only to be used in conjunction with UnitsDB? - -No. There is information contained in the UnitsDB that may -be useful for using UnitsML, and one output format for -UnitsDB is UnitsML, but the UnitsML schema is designed for -marking up units of measure within other markup languages -independent from UnitsDB. diff --git a/_pages/privacy.adoc b/_pages/privacy.adoc deleted file mode 100644 index 17325c2..0000000 --- a/_pages/privacy.adoc +++ /dev/null @@ -1,6 +0,0 @@ ---- -layout: docs-base -html-class: docs-page -title: Privacy policy ---- -To be provided. diff --git a/_pages/software.html b/_pages/software.html deleted file mode 100644 index 423c127..0000000 --- a/_pages/software.html +++ /dev/null @@ -1,6 +0,0 @@ ---- -title: UnitsML software -description: Software behind and for working with UnitsML -layout: software-index -hero_include: index-page-hero.html ---- diff --git a/_pages/specs.html b/_pages/specs.html deleted file mode 100644 index ce59972..0000000 --- a/_pages/specs.html +++ /dev/null @@ -1,6 +0,0 @@ ---- -title: UnitsML specifications -description: Documents and specifications related to UnitsML -layout: spec-index -hero_include: index-page-hero.html ---- diff --git a/_pages/tos.adoc b/_pages/tos.adoc deleted file mode 100644 index f0140c6..0000000 --- a/_pages/tos.adoc +++ /dev/null @@ -1,6 +0,0 @@ ---- -layout: docs-base -html-class: docs-page -title: Terms of service ---- -To be provided. diff --git a/_software/schemas.adoc b/_software/schemas.adoc deleted file mode 100644 index 13d7ad8..0000000 --- a/_software/schemas.adoc +++ /dev/null @@ -1,31 +0,0 @@ ---- -title: XML schemas -description: Schemas for using UnitsML in XML. -repo_url: https://github.com/unitsml/schemas - -external_links: - - url: https://github.com/unitsml/schemas - - url: https://schema.unitsml.org/ - title: "Browse schemas" - -docs: - git_repo_url: "https://github.com/unitsml/schemas" - git_repo_subtree: docs - -tags: ["writtenin:XSD", "writtenin:Ruby"] - -feature_with_priority: 1 ---- -UnitsML allows encoding of scientific units of measure and quantities into XML and will validate XML documents that use UnitsML. - -NOTE: The XML schemas contained in this repository can be browsed at https://schema.unitsml.org/[schema.unitsml.org]. - -Types of units include: - -* SI (International System of Units) base and special derived units (e.g., meter, second, joule, volt) -* SI derived units (e.g., square meter, meter per second, mm β€’ s-2) -* Non-SI units (e.g., minute, ångström, and inch) - -We anticipate that UnitsML will be used by the developers of other markup languages to address the needs of specific communities (e.g., mathematics, chemistry, materials science). The UnitsML schema is not intended to be a standalone schema, but rather to be used in combination with other specific schemas through the appropriate use of namespaces. - -Initial development of this schema was done at NIST, but completion of the development process should include input from the international scientific and engineering community. Towards this end, we are initiating an OASIS Technical Committee to address any needed changes in the schema and publish a final recommendation. diff --git a/_software/schemas/assets/symbol.svg b/_software/schemas/assets/symbol.svg deleted file mode 100644 index b97b1e1..0000000 --- a/_software/schemas/assets/symbol.svg +++ /dev/null @@ -1 +0,0 @@ - \ No newline at end of file diff --git a/_software/unitsdb.adoc b/_software/unitsdb.adoc deleted file mode 100644 index aa2d7db..0000000 --- a/_software/unitsdb.adoc +++ /dev/null @@ -1,28 +0,0 @@ ---- -title: UnitsDB -description: Database of scientific units of measure. -repo_url: https://github.com/unitsml/unitsdb - -docs: - git_repo_url: https://github.com/unitsml/unitsdb - git_repo_subtree: docs - -external_links: - - url: https://github.com/unitsml/unitsdb - -tags: ["writtenin:YAML"] - -feature_with_priority: 1 ---- - -The UnitsDB contains detailed units and dimensionality information for an extensive number of SI units and common, non-SI units. The database includes information needed to reference units in an XML document, and specifically includes: - -* Unique identifiers -* Unit symbols -* Language-specific unit names -* Representations in terms of other units (including conversion factors) - -In addition to scientific units, the database will include information about common quantities (e.g., length, mass), including the dimension of quantities with respect to the 7 base quantities. - -UnitsDB in its entirety -can be found in this UnitsDB Github repository. diff --git a/_software/unitsdb/assets/symbol.svg b/_software/unitsdb/assets/symbol.svg deleted file mode 100644 index b97b1e1..0000000 --- a/_software/unitsdb/assets/symbol.svg +++ /dev/null @@ -1 +0,0 @@ - \ No newline at end of file diff --git a/_software/unitsml-ruby.adoc b/_software/unitsml-ruby.adoc deleted file mode 100644 index 3250e7d..0000000 --- a/_software/unitsml-ruby.adoc +++ /dev/null @@ -1,19 +0,0 @@ ---- -title: unitsml-ruby -description: A wrapper gem for UnitsDB. -repo_url: https://github.com/unitsml/unitsml-ruby -repo_branch: main - -docs: - git_repo_url: "https://github.com/unitsml/unitsml-ruby" - git_repo_branch: main - git_repo_subtree: docs - -external_links: - - url: https://github.com/unitsml/unitsml-ruby - -tags: ["writtenin:Ruby", "interface:library"] - -feature_with_priority: 3 ---- - diff --git a/_software/unitsml-ruby/assets/symbol.svg b/_software/unitsml-ruby/assets/symbol.svg deleted file mode 100644 index b97b1e1..0000000 --- a/_software/unitsml-ruby/assets/symbol.svg +++ /dev/null @@ -1 +0,0 @@ - \ No newline at end of file diff --git a/_specs/guidelines.adoc b/_specs/guidelines.adoc deleted file mode 100644 index 34d6090..0000000 --- a/_specs/guidelines.adoc +++ /dev/null @@ -1,15 +0,0 @@ ---- -title: UnitsML documentation source -description: Metanorma sources of UnitsML guidelines. -source_url: https://github.com/unitsml/docs - -external_links: - - url: https://github.com/unitsml/docs - -feature_with_priority: 4 ---- - -Deliverables are available in PDF here (noteβ€”a PDF may be slightly outdated compared to its Metanorma source): - -- link:/assets/ref-docs/UnitsML-Guide-v1.0-wd01.pdf[UnitsML Guide v1.0 (working draft 01)] -- link:/assets/ref-docs/Improving_Interoperability_by_Incorporating_UnitsM.pdf[Improving Interoperability by Incorporating UnitsML into Markup Languages] diff --git a/about.md b/about.md new file mode 100644 index 0000000..7e63e48 --- /dev/null +++ b/about.md @@ -0,0 +1,307 @@ +# About UnitsML + +
+

+ UnitsML is a set of models for unambiguously encoding and identifying scientific units + of measure and quantities, usable in XML and other markup languages. Developed under + CalConnect TC UNITS, it enables reliable scientific + data exchange across systems and disciplines. +

+
+ +::: info +UnitsML is under active development and its documentation may change frequently. +::: + +## The UnitsML Ecosystem + +UnitsML consists of interconnected components that together form a complete system for encoding, storing, and accessing scientific units: + + + +
+
+

UnitsML XML Schemas

+

Authoritative XML schemas for encoding scientific units of measure β€” SI base units, derived units, and non-SI units. Designed to be incorporated into other markup languages.

+ Learn more → +
+
+

UnitsDB

+

A comprehensive database of scientific units with detailed dimensionality information, unique identifiers, symbols, language-specific names, and conversion factors.

+ Learn more → +
+
+

unitsml-ruby

+

A Ruby gem providing programmatic access to UnitsDB, enabling developers to integrate units data into their applications.

+ Learn more → +
+
+ +## Vision + +- A set of models for incorporating UnitsML into any markup language or data format +- Extensive repository of schemas and information on units, quantities, and prefixes +- Designed for unit information processing β€” validation, conversion, and manipulation + +## Governance + +UnitsML is developed through an open standards process: + +
+
+
+ +
+

CalConnect TC UNITS

+

The current home of UnitsML standardization, created in 2022.

+ 2022–present +
+
+
+ +
+

OASIS TC UnitsML

+

Original standards body. TC formed in 2006, completed its mandate in 2016.

+ 2006–2016 +
+
+
+ +
+

NIST

+

Originator and long-term sponsor of UnitsML, through the Physics and MEL laboratories.

+ 1998–present +
+
+ +## History + +A journey spanning over 25 years of standards development: + + + +## People + +UnitsML has been shaped by contributors across government, academia, and industry: + + + +## Participating Organizations + +
+ + + NIST + National Institute of Standards and Technology + + + + CalConnect + Calendaring and Scheduling Consortium + + + + LBNL + Lawrence Berkeley National Laboratory + + + + Ribose + Open standards and security + + + + IBM + OASIS TC participant + + + + CML + Chemical Markup Language + +
+ + + +## Frequently Asked Questions + + diff --git a/assets/css/style.scss b/assets/css/style.scss deleted file mode 100644 index 43b5072..0000000 --- a/assets/css/style.scss +++ /dev/null @@ -1,150 +0,0 @@ ---- ---- - -$accent-color: darken(#d7df23, 20%); -$primary-color: darken(#83cee8, 30%); -$primary-color-dark: darken($primary-color, 20%); -$main-background: linear-gradient(315deg, darken($primary-color, 20%) 0%, darken($primary-color, 10%) 74%) !default; - -@import 'jekyll-theme-open-project'; - -.main-section { - > .title { - font-weight: 500; - } -} - -body > .underlay > footer { - .parent-hub-plug { - display: none !important; - // Temporary measure, until this site is converted to hub site or new framework. - } -} - -body.site--project.layout--home > main > .custom-intro .summary p:first-child:first-letter { - font-size: unset; - line-height: unset; - color: unset; - margin: unset; - float: unset; - padding: unset; -} - -body > .underlay > header > .hamburger-menu { - > nav { - margin-top: 1em - } - - > nav > * { - margin-left: 1.5em - } -} - - -body > .underlay > header { - > .site-logo, - > .hamburger-menu .site-logo-container { - - margin-right: 2em; - - a .symbol { - display: inline-block; - - svg { - height: 2rem; - margin-right: 0.5em; - } - } - - a .title { - display: inline-block; - - svg { - height: 1rem; - * { - fill: white; - } - } - } - - } -} - -body.layout--home > .underlay > .hero { - .illustration { - bottom: -100px !important; - - svg { - height: 200px; - } - } - - > .text { - > .title { - font-weight: normal; - } - } -} - -body.layout--home { - > main .custom-intro .summary { - ul.supported-bibliographies { - li { - .label { - margin-right: 1en; - } - .source, .gem { - white-space: nowrap; - } - .source { - &:after { - content: ", "; - } - - &:last-child:after { - content: unset; - } - } - } - } - } -} - -body.layout--home { - > main > .featured-posts { - .title { - align-self: flex-start; - } - } -} - -body.overview, -body.getting-started { - section.documentation { - margin-bottom: 100px; - } -} - -body.overview section.documentation { - ul.feature-list { - display: flex; - flex-flow: column nowrap; - - li.feature p { - padding-bottom: 1em; - } - - @media screen and (min-width: $bigscreen-breakpoint) { - flex-flow: row wrap; - li { - flex-basis: 50%; - flex: 1 1 auto; - } - } - } - .cta .button { - @include cta-button(transparent, $primary-dark-color); - border-radius: 25px; - border: 1px solid $primary-color; - } -} diff --git a/assets/js/file-browser.js b/assets/js/file-browser.js deleted file mode 100644 index 8c4e956..0000000 --- a/assets/js/file-browser.js +++ /dev/null @@ -1,208 +0,0 @@ -(function () { - - function initFilePreview(containerEl) { - const sitePrefix = containerEl.dataset.filePathPrefix; - function setPath(path) { - containerEl.innerHTML = ''; - const previewEl = containerEl.appendChild(document.createElement('div')); - const linkEl = previewEl.appendChild(document.createElement('a')); - - linkEl.setAttribute('href', `${sitePrefix}${path}`) - const pathParts = path.split('/'); - const filename = pathParts[pathParts.length - 1]; - linkEl.setAttribute('download', filename); - linkEl.innerHTML = `Download
${filename}`; - } - return { - setPath, - } - } - - function initFileBrowser() { - const rootContainer = document.querySelector('[data-file-browser]'); - - // File listing and preview - - const fileListContainer = document.querySelector('[data-file-list]'); - const previewContainer = document.querySelector('[data-file-preview]'); - - if (!fileListContainer || !previewContainer) { - throw new Error("Unable to obtain file list or preview container"); - } - - const allItemPaths = window[fileListContainer.dataset.fileList]; - - if (!allItemPaths) { - throw new Error("Unable to obtain item paths"); - } - - // This is unnecessarily involved, but may be useful - // if we need an hierarchical structure to access items later. - // const allItemPathsAsObject = allItemPaths. - // map(path => ({ [path]: true })). - // reduce((prev, curr) => ({ ...prev, ...curr }), {}); - // const allItemsAsHierarchy = unflattenObject(allItemPathsAsObject); - // const topLevelItemPaths = Object.keys(allItemsAsHierarchy); - - let initialItemPaths, initiallySelectedItemPath; - try { - initialItemPaths = JSON.parse(window.localStorage.getItem('initial-items')); - // Abort loading if previously stored item list somehow contains an item that no longer exists - const missingItem = initialItemPaths. - find(iip => allItemPaths.find(ip => ip === iip || ip.startsWith(`${iip}/`)) < 0); - if (missingItem) { - throw new Error(`Invalid initial items stored (${missingItem} does not exist)`); - } - // Or if selected item path is not found - initiallySelectedItemPath = window.localStorage.getItem('selected-item'); - if (initiallySelectedItemPath && allItemPaths.indexOf(initiallySelectedItemPath) < 0) { - throw new Error(`Invalid selected item stored (${initiallySelectedItemPath} does not exist)`); - } - } catch (e) { - // If no item state to load, only top-level items initially - initialItemPaths = allItemPaths. - map(i => i.split('/')[0]). - filter(function deduplicate(itemID, idx, self) { - return idx === self.indexOf(itemID); - }); - initiallySelectedItemPath = null; - window.localStorage.removeItem('initial-items'); - window.localStorage.removeItem('selected-item'); - console.error("Error loading stored data, reverting to default", e); - } - - const listing = window.createWindowedListing( - initialItemPaths, - fileListContainer, - initiallySelectedItemPath, - onSelectItem, - getItemLabel, - getSubpaths, - isDirectory, - ); - - const filePreview = initFilePreview(previewContainer); - - async function onSelectItem(itemPath, itemEl) { - listing.getVisibleElements().map(element => element.classList.remove('selected')); - itemEl.classList.add('selected'); - window.localStorage.setItem('selected-item', itemPath); - - // If shown items are a result of search, do not update stored state - if (!itemIDsPreSearch) { - window.localStorage.setItem('initial-items', JSON.stringify(listing.getItemIDs())); - } - - if (await isDirectory(itemPath)) { - } else { - filePreview.setPath(itemPath); - } - } - - async function getItemLabel(itemPath) { - const el = document.createElement('span'); - if (await isDirectory(itemPath)) { - el.classList.add('directory'); - } else { - el.classList.add('file'); - } - const parts = itemPath.split('/'); - el.textContent = parts[parts.length - 1]; - return el; - } - - /** Returns true if there is at least one child item for given item ID. */ - async function isDirectory(itemPath) { - if (allItemPaths.find(path => path.startsWith(`${itemPath}/`))) { - return true; - } - return false; - } - - /** Returns a list of immediate child IDs. */ - async function getSubpaths(itemPath) { - const slashCount = (itemPath.match(/\//ig) || []).length; - return allItemPaths.filter(path => - path.startsWith(`${itemPath}/`) && - ((path.match(/\//ig) || []).length === slashCount + 1)); - } - - - // Search - - const search = rootContainer.querySelector('[data-file-search]'); - let itemIDsPreSearch = null; - - if (search) { - - // Try to load previous search, if any - const initialSearchString = window.localStorage.getItem('search-string'); - if (initialSearchString) { - search.value = initialSearchString; - setTimeout(() => { - handleSearch(initialSearchString); - }, 1000); - } - - function itemPathMatchesSearch(itemPath, searchString) { - const pathParts = itemPath.split('/'); - return pathParts[pathParts.length - 1].toLowerCase().indexOf(searchString.toLowerCase()) >= 0; - } - - function handleSearch(searchString) { - localStorage.setItem('search-string', searchString); - if (searchString.length >= 2) { - if (!itemIDsPreSearch) { - itemIDsPreSearch = listing.getItemIDs(); - } - listing.updateItems( - (() => allItemPaths.filter(i => itemPathMatchesSearch(i, searchString))), - true); - } else { - if (itemIDsPreSearch) { - listing.updateItems((() => itemIDsPreSearch), true); - itemIDsPreSearch = null; - } - } - } - - search.addEventListener('keyup', function _handleSearch(evt) { - handleSearch(evt.currentTarget.value); - }); - } - } - - document.addEventListener('DOMContentLoaded', initFileBrowser); - - /** - * Aggregates parts (mapped to slash-separated paths) into a nested object. - * E.g. `{ /some/path: A, /foo: B, /some/other/path: C }` - * gets turned into `{ foo: B, some: { path: A, other: { path: C } } }`. - */ - function unflattenObject(parts) { - const result = {}; - - for (const partPath of Object.keys(parts)) { - if (Object.prototype.hasOwnProperty.call(parts, partPath)) { - - const keys = partPath.match(/^\/+[^\/]*|[^\/]*\/+$|(?:\/{2,}|[^\/])+(?:\/+$)?/g); - // Matches a standalone slash in a key - //const keys = partPath.match(/^\.+[^.]*|[^.]*\.+$|(?:\.{2,}|[^.])+(?:\.+$)?/g); - - if (keys) { - keys.reduce((accumulator, val, idx) => { - return accumulator[val] || ( - (accumulator[val] = isNaN(Number(keys[idx + 1])) - ? (keys.length - 1 === idx - ? parts[partPath] - : {}) - : []) - ); - }, result); - } - } - } - - return result; - } -})(); diff --git a/assets/js/windowed-listing.js b/assets/js/windowed-listing.js deleted file mode 100644 index f298413..0000000 --- a/assets/js/windowed-listing.js +++ /dev/null @@ -1,312 +0,0 @@ -(function () { - - /** - * Sets up a windowed listing, given `itemIDs` (list of strings) and `scrollView`. - * - * Items may have hierarchy, which is represented in item IDs with forward slashes (`/`). - * - * `itemIDs` should contain a list of items (their IDs) to be shown initially. - * Normally it would be a list of top-level item IDs. - * If there are IDs that are nested, their parents will be auto-expanded - * for items to be shown. - * - * `scrollView` *must* contain at least one item already; it’ll be used as a template. - * The template item must contain a link (``) child with a `` inside, - * where item label will be rendered. - * - * Created item’s DOM element will have `itemID` data attribute set appropriately. - * - * Calls `await isExpandable(itemID: string)` when an item is being constructed. - * If provided and returns true for given item ID, that item can be expanded by the user. - * - * Calls `await getItemLabel(itemID: string)` when an item is being constructed. - * The function is supposed to return a DOM node. - * If the function is not provided or returns a falsey value, raw item ID will be shown. - * - * Calls `await getItemChildren(itemID: string)` when an item is expanded. - * The result should return a list of item IDs to show underneath the expanded item. - * - * Calls `onSelectItem(itemID: string, item: Node)` with selected item, - * letting the user adjust DOM, remember selected item ID, etc. - * - * Returns an object that represents windowed listing API. The API includes: - * - * - `updateItems()`: can be called with an updater function. - * Updater function will receive a list of currently shown item IDs, - * and should return a list of item IDs to be shown. - * This can be used in search functionality: callers can implement a search widget - * that binds `updateItems()` to search query changes. - * - * On initialization, `updateItems()` is called with the initial item ID list. - * - * - `getVisibleElements()`: returns a list of DOM elements shown in item window. - * - * - `getItemIDs()`: returns full list of item IDs that can be shown by scrolling. - * May include more or fewer than initial item IDs, if e.g. parents were expanded/collapsed. - */ - function createWindowedListing ( - initialItemIDs, - scrollView, - initialSelectedItemID, - onSelectItem, - getItemLabel, - getItemChildren, - isExpandable, - ) { - const DEBOUNCE_SCROLL_MS = 50; - const EXTRA_ITEMS_BEFORE = 10; - const EXTRA_ITEMS_AFTER = 10; - - // These three may change at runtime, depending on item expanded state: - let itemIDs = [...initialItemIDs]; - let itemCount = itemIDs.length; - let expandedItems = {}; // A map of { [itemID]: true } - - let selectedItemID = initialSelectedItemID; - - // Relative is important, the remaining ones are useful for small viewports (mobile) - scrollView.style.position = 'relative'; - scrollView.style.overflowY = 'auto'; - // scrollView.classList.add('relative', 'max-h-screen', 'overflow-y-auto'); - - // Keep the first child as template - const firstItem = scrollView.children[0]; - const itemHeight = firstItem.offsetHeight; // Measure it, too - const templateItem = firstItem.cloneNode(true); - - // Clear scroll view and add a height-forcing div - scrollView.innerHTML = ''; - const heightExpander = document.createElement('div'); - heightExpander.style.height = `${itemCount * itemHeight}px`; - scrollView.appendChild(heightExpander); - - // If item is selected, scroll the outer element to make it appear in view - // before initializing item window - if (initialSelectedItemID) { - const selectedItemIdx = itemIDs.indexOf(initialSelectedItemID); - if (selectedItemIdx >= 0) { - scrollView.scrollTop = (selectedItemIdx * itemHeight); - } - } - - // Automatically refresh window on each subsequent scroll - let scrollTimeout = null; - function handleScrollDebounced() { - if (scrollTimeout) { window.clearTimeout(scrollTimeout); } - scrollTimeout = setTimeout(refreshItemWindow, DEBOUNCE_SCROLL_MS); - } - scrollView.addEventListener('scroll', handleScrollDebounced); - - - // DOM element representing the window of currently visible items. - let itemWindow = null; - - // Update items to initial list; also refreshes the window. - updateItems((() => initialItemIDs), true); - - /** - * Updates the list of all items, even those not in the window. - * - * This can be used in cases like expanding items that contain children - * (children will be inserted in the list), - * or when applying filters. - * - * - `updaterFunc` will receive the current list of items and must receive the new one. - * - The `resetExpanded` flag will collapse any previously expanded items in the beginning. - * - For nested items, any missing parents will be implicitly added and expanded. - */ - async function updateItems(updaterFunc, resetExpanded) { - if (resetExpanded === true) { - expandedItems = {}; - } - - itemIDs = updaterFunc(itemIDs).filter(function deduplicate(itemID, idx, self) { - return idx === self.indexOf(itemID); - }); - - function _expandParents(iid, idx) { - if (iid.indexOf('/') >= 0) { - const parts = iid.split('/'); - const parentsToExpand = []; - - let currentParent = ''; - for (const part of parts.slice(0, parts.length - 1)) { - if (currentParent) { - currentParent = `${currentParent}/${part}`; - } else { - currentParent = part; - } - parentsToExpand.push(currentParent); - } - - parentsToExpand.reverse(); - for (const par of parentsToExpand) { - expandedItems[par] = true; - if (itemIDs.indexOf(par) < 0) { - itemIDs.splice(idx, 0, par); - } - } - } - } - - // Expand parents of shown items, if needed - for (const [idx, iid] of itemIDs.entries()) { - _expandParents(iid, idx); - } - - itemCount = itemIDs.length; - - await refreshItemWindow(); - } - - async function onToggleItem(itemID) { - if (expandedItems[itemID]) { - return onCollapseItem(itemID); - } else { - return onExpandItem(itemID); - } - } - - async function onExpandItem(itemID) { - if (isExpandable && getItemChildren && await isExpandable(itemID)) { - const childrenIDs = await getItemChildren(itemID); - const itemIdx = itemIDs.indexOf(itemID); - if (itemIdx >= 0 && childrenIDs) { - expandedItems[itemID] = true; - await updateItems(items => [ - ...items.slice(0, itemIdx + 1), - ...childrenIDs, - ...items.slice(itemIdx + 1), - ]); - } - if (childrenIDs.length == 1) { - await onExpandItem(childrenIDs[0]); - } else { - for (const cid of childrenIDs) { - if (expandedItems[cid]) { - await onExpandItem(cid); - } - } - } - } - } - async function onCollapseItem(itemID) { - if (expandedItems[itemID]) { - expandedItems[itemID] = false; - delete expandedItems[itemID]; - await updateItems(items => items.filter(iid => iid.startsWith(`${itemID}/`) !== true)); - } - } - - /** - * Updates DOM to show elements that should be visible in scrollable viewport. - * Must be called whenever visible items may have changed, which is two cases: - * - * - The underlying list of items has changed - * (filters applied, parent expanded or collapsed, item deleted/added). - * See `updateItems()`. - * - * - Scrolling occurred. - */ - async function refreshItemWindow() { - heightExpander.style.height = `${itemCount * itemHeight}px`; - - // Clean up previous window and xml2rfc resolver-watcher - if (itemWindow !== null) { - scrollView.removeChild(itemWindow); - } - - // Add item window to main scroll view - itemWindow = scrollView.appendChild(document.createElement('div')); - - // Determine which items to show - let firstIdx = Math.floor(scrollView.scrollTop / itemHeight) - EXTRA_ITEMS_BEFORE; - if (firstIdx < 0) { - firstIdx = 0; - } - let lastIdx = firstIdx + Math.ceil(scrollView.offsetHeight / itemHeight) + 1 + EXTRA_ITEMS_AFTER; - if (lastIdx + 1 >= itemCount) { - lastIdx = itemCount - 1; - } - - // Position window absolutely within the large scroll view, - // depending on which item is first in view - itemWindow.style.top = `${firstIdx * itemHeight}px`; - itemWindow.style.position = 'absolute'; - itemWindow.style.right = '0'; - itemWindow.style.left = '0'; - - // For each item to show, create element and append it to item window - for (const [, itemID] of [...itemIDs.entries()].filter(([idx, ]) => idx >= firstIdx && idx <= lastIdx)) { - const el = itemWindow.appendChild(await makeItem(itemID)); - if (itemID === selectedItemID) { - // If this item happens to be selected, make it look so - onSelectItem(itemID, el); - } - } - - return itemWindow; - } - - // Constructing items from template - - async function makeItem(itemID) { - const indentation = itemID.split('/').length; - - const newItem = templateItem.cloneNode(true); - - const labelEl = newItem.querySelector('span'); - labelEl.style.paddingLeft = `${indentation - 1}em`; - - newItem.dataset.itemID = itemID; - newItem.setAttribute('title', itemID); - newItem.style.cursor = 'pointer'; - - labelEl.innerHTML = ''; - - const iconEl = labelEl.appendChild(document.createElement('i')); - iconEl.style.width = '1.5em'; - iconEl.style.marginRight = '.5em'; - if (await isExpandable(itemID)) { - if (expandedItems[itemID]) { - iconEl.classList.add('fas', 'fa-folder-open'); - } else { - iconEl.classList.add('fas', 'fa-folder'); - } - } else { - iconEl.classList.add('fas', 'fa-file'); - } - - labelEl.appendChild(await getItemLabel(itemID)); - - newItem.addEventListener( - 'click', - function handleItemClick (evt) { - selectedItemID = itemID; - onSelectItem(itemID, newItem); - onToggleItem(itemID); - }, - ); - - return newItem; - } - - function getVisibleElements() { - if (itemWindow) { - return [...itemWindow.children]; - } - } - - function getItemIDs() { - return itemIDs; - } - - return { - updateItems, - getVisibleElements, - getItemIDs, - } - } - - window.createWindowedListing = createWindowedListing; -})(); diff --git a/blog/2022-09-11-calconnect-tc-units-established.md b/blog/2022-09-11-calconnect-tc-units-established.md new file mode 100644 index 0000000..3390792 --- /dev/null +++ b/blog/2022-09-11-calconnect-tc-units-established.md @@ -0,0 +1,51 @@ +--- +title: CalConnect establishes TC UNITS, adopts UnitsML +date: 2022-09-11 +authors: + - CalConnect +description: CalConnect announces the establishment of its Technical Committee on Units of Measure (TC UNITS) and the adoption of UnitsML as the authoritative mechanism for encoding scientific units. +--- + +# CalConnect establishes TC UNITS, adopts UnitsML + +The Calendaring and Scheduling Consortium ([CalConnect](https://www.calconnect.org)) has announced the establishment of its Technical Committee on Units of Measure β€” **TC UNITS** β€” and the adoption of UnitsML as the authoritative mechanism for encoding scientific units of measure. + +## Why a Technical Committee for units + +Units and their representations form the basis of measurements, critical to everything from timekeeping and trade to manufacturing and mission-critical operations. Despite the universal importance of units, there has been no single authoritative mechanism for representing them unambiguously in digital systems. + +TC UNITS is chartered to change that. Its scope includes: + +- **Standardization of a comprehensive data model** for units representation +- **Multiple serialization formats** including XML (UnitsML), JSON, and YAML +- **The authoritative UnitsDB register** β€” a structured database of units, quantities, dimensions, prefixes, scales, and unit systems +- **Integration guidelines** with existing technologies such as MathML +- **Development and maintenance** of the UnitsML official website + +## International collaboration + +A key objective of TC UNITS is to pursue international standardization through ISO and IEC, while working closely with the International Bureau of Weights and Measures (BIPM) towards an interoperable **"Digital SI"** infrastructure. + +As Mike Douglass, Executive Director of CalConnect, stated: + +> "Our collaboration with ISO, IEC, and BIPM will ensure UnitsML becomes a globally recognized standard for digital unit representation." + +## Leadership + +The committee is led by co-chairs **Karen Olsen** and **Nick Nicholas**, who bring deep expertise in standards development and scientific unit representation. + +## What this means for UnitsML + +The establishment of TC UNITS marks a significant milestone for UnitsML. Under CalConnect's governance, UnitsML gains: + +- **Formal standards process** β€” structured development and publication of UnitsML specifications +- **International alignment** β€” coordination with ISO, IEC, and BIPM ensures global interoperability +- **Long-term maintenance** β€” a standing committee ensures ongoing development and community engagement + +Established in September 2022 as a standing committee, TC UNITS represents a significant step forward in the standardization of scientific unit representation while pursuing broader international adoption. + +## Learn more + +- [CalConnect TC UNITS announcement](https://www.calconnect.org/news/2022-09-11-establishing-tc-units-adopting-unitsml/) +- [What is UnitsML](/learn/what-is-unitsml) β€” learn about the UnitsML data model +- [UnitsDB](/unitsdb/) β€” browse the authoritative database of scientific units diff --git a/blog/2025-03-15-unitsdb-1.0.md b/blog/2025-03-15-unitsdb-1.0.md new file mode 100644 index 0000000..90ad089 --- /dev/null +++ b/blog/2025-03-15-unitsdb-1.0.md @@ -0,0 +1,63 @@ +--- +title: Introducing UnitsDB 1.0 +date: 2025-03-15 +authors: + - UnitsML Team +description: UnitsDB 1.0 is the first stable release of the authoritative database of scientific units, quantities, dimensions, prefixes, and unit systems. +--- + +# Introducing UnitsDB 1.0 + +We are pleased to announce the first stable release of **UnitsDB** β€” the authoritative, machine-readable database of scientific units of measure. + +UnitsDB 1.0 provides a comprehensive, structured dataset covering the SI system and widely used non-SI units. Every entity is identified by both a NIST identifier and a human-readable short name, making the database useful for both reference and programmatic access. + +## What's in the database + +UnitsDB 1.0 ships with data across five entity types, all authored in YAML for easy reading and editing: + +| Type | Count | +|------|-------| +| Units | 380+ | +| Quantities | 180+ | +| Dimensions | 84 | +| Prefixes | 33 | +| Unit Systems | 5 | + +### Units + +The units dataset covers SI base units (meter, kilogram, second, ampere, kelvin, mole, candela), SI derived units (newton, pascal, joule, watt, volt, hertz, and many more), and non-SI units accepted for use with SI (minute, hour, day, degree, liter, tonne, and others). + +Each unit entry includes: + +- **Identifiers** β€” NIST ID and short name +- **Dimension reference** β€” linking to the corresponding dimension +- **Quantity references** β€” quantities this unit measures +- **System membership** β€” which unit systems the unit belongs to +- **Root unit decomposition** β€” how derived units relate to base units + +### Quantities + +Physical quantities like length, mass, time, force, energy, and pressure, each typed as either base or derived and linked to their dimension. + +### Dimensions + +SI base quantity dimensional powers (L, M, T, I, Θ, N, J) defining the dimensional analysis framework. + +### Prefixes + +All 33 SI decimal prefixes from quecto (10⁻³⁰) to quetta (10³⁰), including binary prefixes (kibi, mebi, gibi, etc.). + +### Unit systems + +The five core systems: SI base, SI derived special, SI derived non-special, non-SI acceptable, and non-SI not acceptable. + +## Getting started + +The YAML data files are available in the [UnitsDB repository on GitHub](https://github.com/unitsml/unitsdb). For Ruby developers, the [unitsdb-ruby](/software/unitsdb-ruby) gem provides programmatic access to the database. + +You can also browse every entity interactively on the [UnitsDB browser](/unitsdb/). + +## What's next + +UnitsDB 1.0 is the foundation. We are already working on [UnitsDB 2.0](/blog/2025-05-21-unitsdb-2.0), which will bring multilingual names, enhanced symbol representations, organization-neutral identifiers, and many new entities. diff --git a/blog/2025-05-21-unitsdb-2.0.md b/blog/2025-05-21-unitsdb-2.0.md new file mode 100644 index 0000000..e40adb0 --- /dev/null +++ b/blog/2025-05-21-unitsdb-2.0.md @@ -0,0 +1,110 @@ +--- +title: UnitsDB 2.0 β€” multilingual names, new identifiers, and expanded coverage +date: 2025-05-21 +authors: + - UnitsML Team +description: UnitsDB 2.0 brings organization-neutral identifiers, multilingual names, enhanced symbol representations, unit scales, and 15+ new quantities. +--- + +# UnitsDB 2.0 β€” multilingual names, new identifiers, and expanded coverage + +We are releasing **UnitsDB 2.0**, a major update to the authoritative database of scientific units. This release introduces structural improvements, richer metadata, and expanded coverage that make UnitsDB more interoperable and internationally accessible. + +## Organization-neutral identifiers + +Every entity now carries a `unitsml` type identifier alongside the existing NIST identifier: + +```yaml +identifiers: + - id: u:meter + type: unitsml + - id: NISTu1 + type: nist +``` + +These organization-neutral IDs (like `u:meter`, `q:force`, `d:length`) provide stable, namespace-prefixed identifiers that are not tied to any single organization. This makes UnitsDB data portable across systems and easier to reference in linked-data contexts. + +## Multilingual support + +Units and quantities now include names in multiple languages. For the initial release, French translations sourced from the BIPM SI Digital Framework have been added: + +```yaml +names: + - value: length + lang: en + - value: longueur + lang: fr +``` + +This lays the groundwork for supporting additional languages in future releases. + +## Enhanced symbol representations + +Symbols now include six representation formats across entities that use them (units, prefixes, dimensions): + +| Format | Use case | +|--------|----------| +| `unicode` | Direct rendering in text | +| `html` | Web display | +| `latex` | Scientific documents | +| `mathml` | Mathematical markup | +| `ascii` | Plain-text contexts | +| `id` | Machine-readable identifiers | + +## Unit scales + +A new entity type β€” **scales** β€” has been added to UnitsDB. Scales define the measurement scale properties for units, covering continuous ratio, continuous interval, logarithmic, discrete, and other scale types. Five scale definitions are included in this release. + +## 15+ new quantities and dimensions + +UnitsDB 2.0 adds quantities and dimensions from ISO and IEC standards: + +- **ISO 80000-8**: octave and decade for logarithmic frequency range +- **IEC 80000-13**: erlang (E), baud (Bd), shannon (Sh), hartley (Hart) +- New radiation quantities: fluence, fluence rate, kerma rate, exposure, emission rate +- Temperature quantities: ITS-90 (kelvin and celsius), PLTS-2000 +- Phase, relative humidity, fuel efficiency, and more + +## Structured references + +Entities now include formalized references to external authorities: + +```yaml +references: + - uri: http://si-digital-framework.org/quantities/LENG + type: normative + authority: si-digital-framework +``` + +References link to authoritative sources like the SI Digital Framework, UCUM, and ISO/IEC standards. + +## Schema versioning + +All YAML files now include a `schema_version` field, enabling applications to detect and adapt to structural changes between releases. + +## Data quality improvements + +This release includes numerous corrections: + +- Fixed dimensional assignments for units that were incorrectly categorized (e.g., pH as acidity, not plane angle; acre as area, not length) +- Sequential quantity identifiers for consistency +- Normalized YAML structure across all files +- Bidirectional verification of dimension ↔ unit and quantity ↔ unit references + +## Migration from 1.0 + +Applications using UnitsDB 1.0 will need to update parsers for: + +- New `schema_version` field in all files +- `power` field (was `powerNumerator`) in dimensions +- Language-specific name objects (`{value, lang}`) instead of flat strings +- Expanded symbol representation formats +- New reference structure for external authorities + +See the [full release notes](https://github.com/unitsml/unitsdb/blob/main/RELEASE-NOTES.adoc) for complete migration details. + +## Explore the data + +- [UnitsDB browser](/unitsdb/) β€” search and browse all entities interactively +- [GitHub repository](https://github.com/unitsml/unitsdb) β€” download YAML data files +- [unitsdb-ruby](/software/unitsdb-ruby) β€” Ruby library for programmatic access diff --git a/blog/2026-04-28-site-redesign.md b/blog/2026-04-28-site-redesign.md new file mode 100644 index 0000000..956296d --- /dev/null +++ b/blog/2026-04-28-site-redesign.md @@ -0,0 +1,58 @@ +--- +title: UnitsML.org gets a full redesign +date: 2026-04-28 +authors: + - UnitsML Team +description: We've rebuilt unitsml.org with an interactive UnitsDB browser, full-text search, dark mode, and a clearer information architecture. +--- + +# UnitsML.org gets a full redesign + +We've completely rebuilt **unitsml.org** to better serve the scientific units community. The new site features a modern design, interactive data browsing, and a clearer structure for learning about UnitsML. + +## What changed + +### Interactive UnitsDB + +The headline feature is the new [UnitsDB browser](/unitsdb/). Instead of downloading YAML files to explore the database, you can now search, filter, and browse all **716 entities** β€” units, quantities, dimensions, prefixes, scales, and unit systems β€” directly in your browser. + +Every entity has its own page with cross-linked references. Click a unit's dimension to jump to that dimension, then see all units sharing it. The browser supports: + +- **Full-text search** β€” find any entity by name, symbol, or identifier +- **Lazy-loaded data** β€” each entity type loads on demand, so the page stays fast +- **Cross-linked entities** β€” navigate between dimensions, quantities, units, and systems +- **Multilingual names** β€” entities display names in multiple languages where available + +### Restructured content + +We reorganized the site around how people actually use it: + +- **[Learn](/learn/what-is-unitsml)** β€” guides for understanding what UnitsML is, how it works, and how to incorporate it into your work +- **[UnitsDB](/unitsdb/)** β€” the interactive database browser, now a top-level section +- **[Software](/software/)** β€” libraries like [unitsml-ruby](/software/unitsml-ruby) for programmatic access +- **[Schemas](/schemas)** β€” both the UnitsML XML Schemas and the UnitsDB YAML schemas, in a dedicated page + +### Site features + +- **Site-wide search** β€” full-text search across all pages, instantly accessible from any page +- **Dark mode** β€” proper dark theme support throughout the entire site +- **Mobile-friendly** β€” responsive layouts that work on phones and tablets +- **JSON API** β€” programmatic access to UnitsDB data at `/unitsdb/units.json`, `/unitsdb/quantities.json`, and other endpoints +- **JSON-LD downloads** β€” complete linked-data dataset at `/unitsdb/unitsdb.jsonld` + +## What's next + +This redesign is just the beginning. Here's what we're working on: + +- **More software libraries** β€” expanding beyond Ruby with libraries for other languages +- **UnitsDB data expansion** β€” more units, quantities, and dimensions as the database grows +- **Community contributions** β€” opening up the database for community submissions +- **Enhanced schema tooling** β€” better validation and documentation for both XML and YAML schemas + +## Get involved + +UnitsML is developed under [CalConnect TC UNITS](https://www.calconnect.org). If you work with scientific data, measurement systems, or unit conversions, we'd love your input: + +- Browse the database at [unitsml.org/unitsdb](/unitsdb/) +- Explore the code on [GitHub](https://github.com/unitsml) +- Star and watch the [GitHub repository](https://github.com/unitsml/unitsml.github.io) diff --git a/blog/index.md b/blog/index.md new file mode 100644 index 0000000..5315819 --- /dev/null +++ b/blog/index.md @@ -0,0 +1,7 @@ +--- +title: Blog +description: The UnitsML blog +outline: false +--- + + diff --git a/custom-intro.html b/custom-intro.html deleted file mode 100644 index 5ff6d39..0000000 --- a/custom-intro.html +++ /dev/null @@ -1,14 +0,0 @@ -
-

- UnitsML is the authoritative mechanism for encoding scientific units of measure. -

- -
- - Learn more about UnitsML - - - See the FAQ - -
-
diff --git a/faq.md b/faq.md new file mode 100644 index 0000000..5560259 --- /dev/null +++ b/faq.md @@ -0,0 +1,12 @@ +--- +title: FAQ +description: Frequently asked questions about UnitsML +--- + + + +Redirecting to [FAQ on About page](/about#frequently-asked-questions)... diff --git a/get-started.md b/get-started.md new file mode 100644 index 0000000..d248729 --- /dev/null +++ b/get-started.md @@ -0,0 +1,247 @@ +--- +title: Get Started +description: Quick-start guide for using UnitsML +--- + +# Get Started + +Everything you need to start using UnitsML in your projects β€” whether you're encoding units in XML, browsing schemas, or integrating the units database programmatically. + +## Choose your path + +
+ +
+ +
+

XML Encoding

+

Use UnitsML schemas to encode units in your XML documents.

+ + +
+ +
+

Browse Schemas

+

Explore schema definitions interactively at schema.unitsml.org.

+ + +
+ +
+

Programmatic Access

+

Use the unitsml-ruby gem to query UnitsDB from your applications.

+ +
+ +## XML Encoding {#xml-encoding} + +The UnitsML XML Schema defines how to encode units of measure in XML documents. Here's how to get started: + +### 1. Reference the schema + +Add the UnitsML namespace to your XML document: + +```xml + +``` + +### 2. Define a unit + +```xml + + + metre + SI + + +``` + +### 3. Use the unit in your data + +```xml + + 9.81 + Gravitational acceleration + +``` + +::: tip +UnitsML is designed to be **incorporated into other markup languages**, not used standalone. The models work best when embedded in domain-specific formats like MatML, CML, or your own vocabulary β€” and can also be expressed in JSON, YAML, and other formats. +::: + +## Browse Schemas {#browse-schemas} + +The interactive schema browser provides documentation for all UnitsML schema components: + +
+
+

schema.unitsml.org

+

Browse element definitions, type hierarchies, and schema documentation for all versions.

+
+ + Open browser + + +
+ +## Programmatic Access {#programmatic-access} + +Use the **unitsml-ruby** gem to query UnitsDB from Ruby applications: + +### Install + +```bash +gem install unitsml-ruby +``` + +### Query units + +```ruby +require 'unitsml' + +# Find a specific unit +unit = Unitsml::Units.find("m") +puts unit.name # => "metre" +puts unit.symbol # => "m" +``` + +See the [unitsml-ruby page](/software/unitsml-ruby) for full API documentation. + +## Next steps + +- Read the [UnitsML Guide](/learn/guide) for in-depth usage patterns +- Learn [how to incorporate UnitsML](/learn/incorporating-unitsml) into other markup languages +- Understand [what UnitsML is](/learn/what-is-unitsml) and the problems it solves +- Explore [UnitsDB](/unitsdb/) β€” the complete units database + +## Next steps + +- Read the [UnitsML Guide](/learn/guide) for in-depth usage patterns +- Learn [how to incorporate UnitsML](/learn/incorporating-unitsml) into other markup languages +- Understand [what UnitsML is](/learn/what-is-unitsml) and the problems it solves +- Explore [UnitsDB](/unitsdb/) β€” the complete units database + + diff --git a/index.adoc b/index.adoc deleted file mode 100644 index d596584..0000000 --- a/index.adoc +++ /dev/null @@ -1,4 +0,0 @@ ---- -layout: home -hero_include: home-hero.html ---- diff --git a/index.md b/index.md new file mode 100644 index 0000000..6ed6d1e --- /dev/null +++ b/index.md @@ -0,0 +1,5 @@ +--- +layout: home +--- + + diff --git a/learn/guide.md b/learn/guide.md new file mode 100644 index 0000000..221a7b7 --- /dev/null +++ b/learn/guide.md @@ -0,0 +1,406 @@ +--- +title: UnitsML Guide +description: Comprehensive guide for using UnitsML β€” encoding units, working with schemas, and integrating UnitsML into applications +--- + +# UnitsML Guide + +This guide covers the practical aspects of using UnitsML: encoding units of measure in XML and other formats, working with the schema, querying unit data programmatically, and adopting UnitsML in your projects. + +## Quick reference + +| What you need | Where to go | +|---------------|------------| +| Use UnitsML in XML | [XML Encoding](#xml-encoding) below | +| Browse schema documentation | [schema.unitsml.org](https://schema.unitsml.org) | +| Query units programmatically | [Programmatic access](#programmatic-access) below | +| Add UnitsML to your schema | [Incorporating UnitsML](/learn/incorporating-unitsml) | +| Understand the data model | [How UnitsML Works](/learn/how-it-works) | + +## XML Encoding + +### Step 1: Declare the UnitsML namespace + +Add the UnitsML namespace and schema location to your document: + +```xml + +``` + +### Step 2: Define the units you need + +Create a `UnitSet` with the units referenced in your document: + +```xml + + + + metre + m + + + + + pascal + Pa + + + + + + + + + + standard atmosphere + atm + + + + + +``` + +### Step 3: Define dimensions (optional but recommended) + +```xml + + + + + + + + + + +``` + +### Step 4: Reference units from your data + +Use `unitURL` attributes to link data values to their unit definitions: + +```xml + + 1 + 101325 + + + + 100 + Length of the test track + +``` + +## Common encoding patterns + +### Composite units + +Most real-world units are composite β€” built from base units via multiplication, division, and exponentiation. UnitsML represents these with `RootUnits` containing one or more `EnumeratedRootUnit` elements: + +```xml + + + newton + N + + + + + + +``` + +Key points about composite units: + +- **Powers**: Use `powerNumerator` for positive/negative exponents (e.g., `-2` for s⁻²). Use `powerDenominator` for fractional powers. +- **Prefixes**: Apply prefixes to individual root units (e.g., `prefix="k"` on gram to represent kilogram). +- **Dimensions**: Every composite unit must link to a matching `Dimension` via `dimensionURL`. + +See [How UnitsML Works β€” Composite units](/learn/how-it-works#composite-units-derived-unit-decomposition) for the full reference. + +### Temperature with offset + +Temperature conversions require both a multiplier and an offset: + +```xml + + degree Celsius + degC + + + + +``` + +### Understanding the conversion formula + +UnitsML uses a general linear conversion equation: **y = d + ((b / c) Γ— (x + a))** + +Where: +- `x` is the value in the initial unit +- `y` is the value in the target unit +- `a` is the initial addend (offset applied to x before scaling) +- `b` is the numerator of the multiplicand +- `c` is the denominator of the multiplicand +- `d` is the final addend (offset applied after scaling) + +For a simple scaling (e.g., metres to kilometres): only `b / c` is needed (`b="0.001"`, `c="1"`). +For a temperature offset (e.g., Kelvin to Celsius): use `a` and `d` in addition to the scaling factor. + +### Counted items + +Some measurements involve counted entities that are not themselves units β€” for example "electrons per second" or "particles per cubic metre". UnitsML handles these with `CountedItem`: + +```xml + + + electron + + +``` + +The correct expression for "electron emission rate = 1.36 s⁻¹" uses a counted item reference, not a unit named "electron". Counted items can be combined with units using `ExternalRootUnit`. + +### Derived units with prefixes + +Combine prefixes with root units for scaled derived units: + +```xml + + kilopascal + kPa + + + + + + +``` + +### Complex derived units + +Express units like "joules per kilogram kelvin" (specific heat capacity): + +```xml + + joule per kilogram kelvin + J/(kgΒ·K) + + + + + + +``` + +### Multiple code list references + +Link a unit to multiple external code systems: + +```xml + + metre + + + +``` + +## Working with UnitsDB + +UnitsDB provides authoritative definitions for over 380 units and 180 quantities β€” a comprehensive, schema-validated database of scientific units of measure. You can use UnitsDB data instead of defining units from scratch. + +### Accessing UnitsDB + +- **Interactive browser**: [UnitsDB](/unitsdb/) β€” search, browse, and download entities as JSON-LD +- **JSON index**: [`/unitsdb/index.json`](/unitsdb/index.json) β€” machine-readable index of all 716 entities +- **Programmatic**: [unitsml-ruby](/software/unitsml-ruby) β€” Ruby gem for querying UnitsDB +- **Raw data**: [GitHub](https://github.com/unitsml/unitsdb) β€” YAML source files and schemas + +### Using UnitsDB definitions + +UnitsDB entries use systematic IDs (e.g., `NISTu1` for meter). You can reference these directly: + +```xml + + + + meter + m + + +``` + +## Programmatic access + +### Ruby (unitsml-ruby) + +```ruby +require 'unitsml' + +# Look up a unit by identifier +unit = Unitsml::Units.find("m") +puts unit.name # => "metre" +puts unit.symbol # => "m" + +# Query units by quantity +length_units = Unitsml::Units.by_quantity("length") +length_units.map(&:symbol) +# => ["m", "km", "cm", "mm", "in", "ft", ...] + +# Access conversion factors +unit = Unitsml::Units.find("km") +puts unit.conversion_to("m") # => 1000 +``` + +### XML processing (any language) + +UnitsML XML can be processed with standard XML libraries in any language: + +- **Python**: `lxml` or `xml.etree` β€” parse UnitsML elements via XPath +- **Java**: JAXB with XSD binding β€” generate Java classes from the UnitsML schema +- **JavaScript/Node.js**: `fast-xml-parser` or `xml2js` β€” parse UnitsML documents +- **.NET**: `XmlSerializer` with schema binding β€” strongly-typed UnitsML processing + +## Validation + +### XML Schema validation + +Validate your documents against the UnitsML schema using standard tools: + +```bash +# Using xmllint +xmllint --schema https://schema.unitsml.org/unitsml/unitsml-v1.0.xsd document.xml + +# Using Java (JAXP) +java -jar jing.jar https://schema.unitsml.org/unitsml/unitsml-v1.0.xsd document.xml +``` + +### Dimensional consistency + +While XML Schema validation checks structural correctness, **dimensional consistency** β€” ensuring that units match their declared dimensions and that conversions are dimensionally valid β€” requires application-level logic. This is where tools built on UnitsDB (like unitsml-ruby) add value. + +## Best practices + +### Unit identifiers + +- Use meaningful, short IDs: `xml:id="m"` for meter, `xml:id="degC"` for degree Celsius +- For UnitsDB compatibility, use the NIST convention: `NISTu1`, `NISTu11`, etc. +- Keep IDs unique within your document + +### Dimensions + +- Always link units to dimensions via `dimensionURL` β€” this enables dimensional analysis +- Define dimensions in a `DimensionSet` container for clarity +- Reuse dimension definitions across multiple units with the same dimensionality + +### Conversions + +- Include conversion factors for non-SI units β€” this enables automatic unit conversion +- Use `exact="true"` when the conversion factor is exact (e.g., 1 ft = 0.3048 m exactly) +- Include `multiplicandDigits` to track significant digits for approximate conversions + +### Symbols + +- Provide symbols in multiple typefaces for maximum compatibility +- Always include an ASCII representation for systems that don't support Unicode +- Use the `typeface` attribute to distinguish representations + +### Code lists + +- Include code list references when your units need to map to external classification systems +- Common code lists include UN/ECE Recommendation 20, UCUM, and IEC 61360 + +## Schema documentation + +The complete UnitsML 1.0 schema documentation is available interactively at: + +
+
+

schema.unitsml.org

+

Browse element definitions, type hierarchies, and documentation for all schema components.

+
+ + Open browser + + +
+ +## Related resources + +- [What is UnitsML](/learn/what-is-unitsml) β€” conceptual overview +- [How UnitsML works](/learn/how-it-works) β€” technical architecture +- [Incorporating UnitsML](/learn/incorporating-unitsml) β€” integration methods +- [Software](/software/) β€” tools and libraries +- [FAQ](/about#frequently-asked-questions) β€” frequently asked questions + + diff --git a/learn/how-it-works.md b/learn/how-it-works.md new file mode 100644 index 0000000..5d72804 --- /dev/null +++ b/learn/how-it-works.md @@ -0,0 +1,584 @@ +--- +title: How UnitsML Works +description: Technical architecture of UnitsML β€” the data model, UnitsDB, custom unit construction, conversion rules, and MathML integration +--- + +# How UnitsML Works + +UnitsML is a set of models for encoding scientific units of measure. It provides the **semantic meaning** of units β€” what a unit represents, how it relates to other units, what quantities it measures, and how to convert between them. This page explains how the pieces fit together. + +## The three-layer architecture + +UnitsML operates across three layers: + +
+
+ 1 +

Data Model

+

Five core element types β€” Unit, Quantity, Dimension, Prefix, CountedItem β€” each wrapped in a Set container. Defined by the UnitsML XML Schema.

+
+
+ 2 +

UnitsDB

+

A pre-built database of 716 commonly used units, quantities, dimensions, prefixes, scales, and systems. Provides ready-to-use definitions with cross-references to BIPM, UCUM, and QUDT.

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+ 3 +

Integration

+

Use UnitsML definitions in your own XML, MathML, JSON, or YAML documents. UnitsML provides semantics; MathML provides presentation.

+
+
+ +## Layer 1: The UnitsML data model + +UnitsML defines five core element types, each wrapped in a corresponding Set container. The containers are modular β€” use one or combine several. + + + +### Unit (`UnitSet` / `Unit`) + +The central element. A **Unit** defines a measurement unit with its name, symbols, system membership, dimensional reference, and optional conversion information. + +```xml + + + + SI + SI_base + + metre + m + m + + +``` + +Key attributes: + +| Attribute/child | Purpose | +|----------------|---------| +| `xml:id` | Unique identifier within the document (e.g., `NISTu1`, `m`) | +| `dimensionURL` | Links to a `Dimension` definition | +| `UnitName` | Human-readable name | +| `UnitSymbol` | Symbol in a specific typeface (ASCII, Unicode, HTML, LaTeX, MathML) | +| `UnitSystem` | System membership (SI, CGS, inch-pound, etc.) | +| `RootUnits` | Decomposition into base units (for derived units) | +| `Conversions` | Conversion factors to other units | + +### Quantity (`QuantitySet` / `Quantity`) + +A **Quantity** is a measurable property β€” length, mass, force, energy, etc. Quantities link abstract concepts to the specific units that can express them. Each quantity is typed as either `base` or `derived` and references a dimension. + +```xml + + + force + F + + + +``` + +A single unit can measure multiple quantities. For example, the metre measures length, wavelength, distance, focal length, and many others. When using UnitsML, you can **tag** which quantity you intend, disambiguating the unit's role: + +```xml +1.83 +550 +``` + +### Dimension (`DimensionSet` / `Dimension`) + +Dimensions express any unit or quantity in terms of the **seven SI base quantities**: + +| Base quantity | Symbol | SI base unit | +|--------------|--------|-------------| +| Length | L | metre | +| Mass | M | kilogram | +| Time | T | second | +| Electric current | I | ampere | +| Thermodynamic temperature | Θ | kelvin | +| Amount of substance | N | mole | +| Luminous intensity | J | candela | + +A dimension definition specifies which base quantities participate and at what power: + +```xml + + + + +``` + +This represents the dimension of force: **LΒ·MΒ·T⁻²**. Any unit with this dimension (newton, dyne, pound-force) can be converted between them, because they share the same dimensional structure. + +The `dimensionless` attribute marks entities that have no dimension (e.g., refractive index, strain, mach number). + +### Prefix (`PrefixSet` / `Prefix`) + +Prefixes define decimal and binary scaling factors. UnitsML supports all 20 SI decimal prefixes defined in the BIPM SI Brochure, plus 7 binary prefixes: + +```xml + + + kilo + k + 10 + 3 + + +``` + +| Prefix | Symbol | Factor | | Prefix | Symbol | Factor | +|--------|--------|--------|-|--------|--------|--------| +| yotta | Y | 10²⁴ | | deci | d | 10⁻¹ | +| zetta | Z | 10Β²ΒΉ | | centi | c | 10⁻² | +| exa | E | 10¹⁸ | | milli | m | 10⁻³ | +| peta | P | 10¹⁡ | | micro | Β΅ | 10⁻⁢ | +| tera | T | 10ΒΉΒ² | | nano | n | 10⁻⁹ | +| giga | G | 10⁹ | | pico | p | 10⁻¹² | +| mega | M | 10⁢ | | femto | f | 10⁻¹⁡ | +| kilo | k | 10Β³ | | atto | a | 10⁻¹⁸ | +| hecto | h | 10Β² | | zepto | z | 10⁻²¹ | +| deka | da | 10ΒΉ | | yocto | y | 10⁻²⁴ | + +Binary prefixes (Ki, Mi, Gi, Ti, Pi, Ei, Zi, Yi) follow the same pattern with base 2. + +### CountedItem (`CountedItemSet` / `CountedItem`) + +Counted items represent things that are counted and combined with scientific units β€” distinct from physical quantities. They support expressions like "electrons per second" or "particles per cubic meter": + +```xml + + + electron + e⁻ + + +``` + +## Layer 2: UnitsDB β€” the pre-built database + +While the UnitsML data model tells you *how* to define a unit, **UnitsDB** provides a ready-made collection of commonly used definitions. Instead of defining every unit from scratch, you reference entries from UnitsDB. + +### What UnitsDB contains + +| Entity type | Count | Description | +|------------|-------|-------------| +| Units | 380+ | SI base, SI derived, non-SI units | +| Quantities | 199 | Measurable properties | +| Dimensions | 92 | SI base quantity dimensional representations | +| Prefixes | 33 | SI decimal and binary prefixes (from BIPM SI Brochure) | +| Scales | 5 | Measurement scale types | +| Unit Systems | 7 | SI, non-SI acceptable, etc. | + +Browse all entries interactively at the [UnitsDB browser](/unitsdb/). + +### How to reference a UnitsDB entry + +In your UnitsML document, reference a UnitsDB unit by its identifier: + +```xml + + metre + m + +``` + +In UnitsDB, the metre is identified by both a NIST ID (`NISTu1`) and an organization-neutral UnitsML ID (`u:meter`). The YAML entry looks like: + +```yaml +identifiers: + - type: nist + id: NISTu1 + - type: unitsml + id: u:meter +names: + - value: metre + lang: en + - value: mΓ¨tre + lang: fr +symbols: + - ascii: m + unicode: m + html: m + latex: "\\ensuremath{\\mathrm{m}}" + mathml: "m" +``` + +### External dataset linkage + +UnitsDB entries include **cross-references to major external datasets**, providing interoperability with other unit systems: + +| Authority | Type | Description | Coverage | +|-----------|------|-------------|----------| +| **BIPM SI Digital Framework** | Normative | Official SI definitions from the International Bureau of Weights and Measures | Units, quantities, dimensions, prefixes | +| **UCUM** | Informative | Unified Code for Units of Measure β€” used in healthcare (HL7) and scientific computing | Units, prefixes | +| **QUDT** | Informative | Quantities, Units, Dimensions and Types β€” comprehensive ontology for engineering and science | Units, quantities, dimensions, prefixes | + +For example, the metre entry links to all three: + +```yaml +references: + - type: normative + authority: si-digital-framework + uri: http://si-digital-framework.org/SI/units/metre + - type: informative + authority: ucum + uri: ucum:base-unit:code:m + - type: informative + authority: qudt + uri: http://qudt.org/vocab/unit/M +``` + +These cross-references allow applications to bridge between UnitsML and other unit systems automatically. + +### Multilingual names + +UnitsDB 2.0 introduced multilingual support. Units and quantities carry names in multiple languages, sourced from the BIPM SI Digital Reference: + +```yaml +names: + - value: length + lang: en + - value: longueur + lang: fr +``` + +## Building custom units + +Not every unit is in UnitsDB. UnitsML provides mechanisms to construct custom units from existing definitions. + +### Adding prefixes + +Apply an SI prefix to any base or derived unit: + +```xml + + kilometer + km + + + + +``` + +### Changing powers + +Express squared, cubed, or inverse units by setting the `powerNumerator`: + +```xml + + + + + + + + +``` + +### Composite units + +Most scientific units are composites β€” products of base units raised to powers. The `RootUnits` element decomposes any derived unit: + +| Composite unit | Decomposition | Dimension | +|---------------|--------------|-----------| +| newton (N) | m Β· kg Β· s⁻² | LΒ·MΒ·T⁻² | +| pascal (Pa) | m⁻¹ Β· kg Β· s⁻² | L⁻¹·MΒ·T⁻² | +| joule (J) | mΒ² Β· kg Β· s⁻² | LΒ²Β·MΒ·T⁻² | +| volt (V) | mΒ² Β· kg Β· s⁻³ Β· A⁻¹ | LΒ²Β·MΒ·T⁻³·I⁻¹ | + +```xml + + newton + N + + + + + + +``` + +For units not in the built-in enumeration, `ExternalRootUnit` allows referencing any unit by URI. + +### Custom units not in UnitsDB + +Define entirely custom units with their own names, symbols, and dimensions: + +```xml + + custom flux unit + cfu + + + + + +``` + +### Tagging quantities + +A single unit can describe multiple quantities. For example, the second measures both time and period. Use the `quantityURL` attribute to tag which quantity you intend: + +```xml +2.5 +0.4 +``` + +This disambiguation is essential because some units share dimensions but represent different quantities β€” hertz and becquerel both decompose to s⁻¹, but one measures frequency while the other measures radioactive activity. + +## Conversion rules + +UnitsML provides three types of unit conversions: + +### Linear conversions + +Most unit conversions follow the linear equation: **y = d + ((b / c) Γ— (x + a))** + +| Factor | Element | Description | +|--------|---------|-------------| +| a | `initialAddend` | Added before multiplication | +| b | `multiplicand` | Multiplication factor | +| c | `divisor` | Division factor | +| d | `finalAddend` | Added after multiplication | + +Simple scaling (m β†’ km): + +```xml + +``` + +Temperature offset (Β°C β†’ K): + +```xml + +``` + +### Special conversions + +For non-linear conversions: + +```xml + + + pH is the negative logarithm of hydrogen ion activity. + + +``` + +### WSDL conversions + +For conversions provided by remote services: + +```xml + +``` + +## Layer 3: Integration with XML and MathML + +UnitsML provides **semantic meaning** β€” what a unit is, what it measures, how it converts. But to **display** a unit symbol in a document, you need presentation markup. This is where **MathML** comes in. + +### How UnitsML and MathML work together + +UnitsML and MathML serve complementary roles: + +- **UnitsML** β€” defines the unit's identity, dimension, system, conversions (the "what") +- **MathML** β€” renders the unit's symbol visually in a document (the "how") + +When you use UnitsML inside an XML document, the unit symbols can be expressed as MathML elements. The UnitsML schema's `UnitSymbol` element supports MathML typeface, and UnitsDB stores MathML representations for every symbol: + +```yaml +symbols: + - mathml: "m" # metre + - mathml: "kg" # kilogram + - mathml: "N" # newton +``` + +### Practical example: PluXML + MathML + +In practice, when a document contains a quantity value, UnitsML identifies the unit and MathML renders it: + +```xml + + 9.81 + + metre per second squared + + + + m + Β· + + s + -2 + + + + + + +``` + +### Programmatic generation with unitsml-ruby + +The [unitsml-ruby](/software/unitsml-ruby) library parses unit expressions (like `m*s^-2` or `kg*m^2/s^3/A`) and automatically generates: + +- **MathML** β€” rendering markup for the unit symbol +- **LaTeX** β€” for scientific documents +- **Unicode** / **HTML** β€” for plain text and web display +- **UnitsML XML** β€” the semantic definition with dimension references + +```ruby +# Parse a unit expression and generate MathML +formula = Unitsml.parse("kg*m^2*s^-3*A^-1") +mathml = formula.to_mathml +# Produces MathML for the volt: kgΒ·mΒ²Β·s⁻³·A⁻¹ +``` + +The library resolves each component against UnitsDB to look up the correct symbol in each representation format, applies prefix and power transformations, and produces properly structured output. + +### Six-format symbol coverage + +UnitsDB stores symbols in six representation formats, enabling integration with any display technology: + +| Format | Use case | Example (metre) | +|--------|----------|-----------------| +| `unicode` | Direct rendering in text | `m` | +| `html` | Web display | `m` | +| `latex` | Scientific documents | `\ensuremath{\mathrm{m}}` | +| `mathml` | Mathematical markup | `m` | +| `ascii` | Plain-text contexts | `m` | +| `id` | Machine-readable identifiers | `m` | + +## Putting it all together + +A complete UnitsML document combines the data model, UnitsDB references, and presentation: + +```xml + + + + metre + m + + + newton + N + + + + + + + + + + + + + force + + + + + + + + + + + + + +``` + +## Schema location + +The UnitsML 1.0 schema uses the following namespace: + +- **Namespace**: `https://schema.unitsml.org/unitsml/1.0` +- **Schema file**: `https://schema.unitsml.org/unitsml/unitsml-v1.0.xsd` +- **Interactive docs**: [schema.unitsml.org](https://schema.unitsml.org) + +## Next steps + +- [Incorporating UnitsML](/learn/incorporating-unitsml) β€” how to add UnitsML to your markup languages +- [UnitsML Guide](/learn/guide) β€” comprehensive usage guide with examples +- [UnitsDB](/unitsdb/) β€” browse the complete interactive database +- [Get started](/get-started) β€” practical quick-start instructions +- [Schemas](/schemas) β€” UnitsML XML Schemas and UnitsDB YAML Schemas + + diff --git a/learn/incorporating-unitsml.md b/learn/incorporating-unitsml.md new file mode 100644 index 0000000..00827fc --- /dev/null +++ b/learn/incorporating-unitsml.md @@ -0,0 +1,257 @@ +--- +title: Incorporating UnitsML into Markup Languages +description: How to incorporate UnitsML models into XML and other markup languages β€” referencing, importing, including, and redefining +--- + +# Incorporating UnitsML into Markup Languages + +One of the core design principles of UnitsML is that it is **meant to be incorporated into other markup languages**, not used as a standalone format. This page explains the four methods for incorporating UnitsML into your own schemas and documents. + +## Why incorporate UnitsML? + +When you incorporate UnitsML into your markup language, you gain: + +- **Ready-made markup** for units of measure, quantities, and dimensions β€” no need to design your own +- **Interoperability** with other markup languages that use UnitsML β€” units defined in one language can be understood by any system that processes UnitsML +- **Dimensional analysis** built into your data model +- **Conversion factors** between units, enabling automated unit conversion + +## Four methods of incorporation + +UnitsML can be incorporated into other XML-based markup languages through four standard XML Schema mechanisms, and the underlying data model is generalizable to JSON, YAML, and other formats: + +### 1. Referencing the schema + +The simplest approach. Your document references the UnitsML schema via `xsi:schemaLocation` and uses UnitsML elements alongside your own domain elements: + +```xml + + + + + metre + m + + + + + 9.81 + Gravitational acceleration + + +``` + +**When to use:** When you want to use UnitsML elements as-is, without any modifications to the schema. + +**How it works:** +- The UnitsML namespace is declared with a prefix (e.g., `unitsml:`) +- All UnitsML elements are qualified with the prefix +- The schema validator fetches and validates against the UnitsML XSD +- Your host schema and the UnitsML schema coexist without conflicts + +### 2. Importing the schema + +Use XSD `` to bring in UnitsML types and elements into your own schema definition: + +```xml + + + + + + + + + + + + + + +``` + +**When to use:** When you're designing a schema that needs to reference UnitsML types and elements as part of its type definitions. + +**How it works:** +- `xs:import` brings in the UnitsML namespace +- Your schema can reference UnitsML elements (`ref="unitsml:UnitSet"`) and types +- The two schemas are separate but can use each other's components + +### 3. Including the schema + +Use XSD `` to embed UnitsML definitions directly into your schema: + +```xml + + + + + + + +``` + +**When to use:** When you want UnitsML components to be part of your target namespace, effectively merging the two schemas. + +**How it works:** +- `xs:include` copies the UnitsML definitions into your schema +- The included definitions become part of your target namespace +- Both your and UnitsML elements are in the same namespace + +::: warning Note +`xs:include` requires that the included schema has the same target namespace as the including schema (or no target namespace). This method is less commonly used with UnitsML. +::: + +### 4. Redefining schema elements + +Use XSD `` to customize UnitsML elements for your domain: + +```xml + + + + + + + + + + + + + + + + + + +``` + +**When to use:** When you need to constrain or extend UnitsML definitions for your specific domain requirements. + +**How it works:** +- `xs:redefine` allows you to restrict or extend existing type definitions +- The redefined types replace the originals throughout the schema +- This is the most powerful but also most complex approach + +## Choosing the right method + +| Method | Complexity | Flexibility | Use case | +|--------|-----------|-------------|----------| +| Reference | Low | Use as-is | Quick integration, no schema modifications | +| Import | Medium | Selective use | Schema design with UnitsML components | +| Include | Medium | Full integration | Single-namespace merge | +| Redefine | High | Custom constraints | Domain-specific customization | + +For most use cases, **referencing** or **importing** is the recommended approach. + +## Practical patterns + +### Pattern: Unit references in data elements + +The most common pattern is to define units in a `UnitSet` container and reference them from data elements using `unitURL` attributes: + +```xml + + + metre + m + + + foot + ft + + + +1.83 +6.00 +``` + +### Pattern: Dimensional validation + +Define dimensions and link them to both units and data elements for dimensional checking: + +```xml + + + + + + + + + + + +100 +299792458 +``` + +### Pattern: Inline unit definitions + +For simple cases, you can embed unit definitions directly within your data elements: + +```xml + + + pascal + Pa + + 101325 + +``` + +### Pattern: Conversion alongside data + +Include conversion information so that consumers can automatically convert between unit systems: + +```xml + + conventional inch of mercury + inHg + + + + +``` + +## Beyond XML + +While UnitsML is defined as an XML Schema, its data model β€” units, quantities, dimensions, prefixes, and conversion factors β€” is generalizable to other representation formats: + +- **JSON** β€” The UnitsML data model can be serialized as JSON for web APIs and modern applications. UnitsDB provides a complete JSON index at [`/unitsdb/index.json`](/unitsdb/index.json). +- **YAML** β€” UnitsDB uses YAML as its native data format, aligned with the UnitsML data model. Each entity type has a dedicated [YAML schema](/schemas) for validation. +- **JSON-LD** β€” UnitsDB provides linked data exports with `@context`, `@id`, and `@type` for semantic web applications. Download per-type collections or the complete dataset from the [UnitsDB browser](/unitsdb/). +- **Databases** β€” UnitsDB implements the UnitsML data model in a queryable database, accessible via the [unitsml-ruby](/software/unitsml-ruby) gem. + +The key concepts (unit identification, dimensional analysis, conversion factors, quantity-unit relationships) are independent of the XML serialization format. + +## Real-world example: AnIML + +The Analytical Information Markup Language (AnIML) is a concrete example of incorporating UnitsML into a domain-specific format. Developed by ASTM Subcommittee E13.15, AnIML is an XML-based format for analytical chemistry data (spectroscopy, chromatography). + +AnIML uses UnitsML for all unit information in its core schema, separating unit concerns from the analytical data structure. The incorporation was done using the **import** method, allowing AnIML to reference UnitsML's `UnitSet` and `Unit` elements without duplicating unit definitions. + +This demonstrates how UnitsML serves as a reusable building block β€” any domain-specific markup language that needs unit information can incorporate UnitsML rather than designing its own unit representation from scratch. + +## Next steps + +- [How UnitsML Works](/learn/how-it-works) β€” detailed technical architecture +- [UnitsML Guide](/learn/guide) β€” comprehensive usage guide +- [Get started](/get-started) β€” practical quick-start instructions +- [UnitsDB](/unitsdb/) β€” browse the complete units database +- [Software](/software/) β€” tools and libraries for working with UnitsML diff --git a/learn/what-is-unitsml.md b/learn/what-is-unitsml.md new file mode 100644 index 0000000..6a5d6ad --- /dev/null +++ b/learn/what-is-unitsml.md @@ -0,0 +1,272 @@ +--- +title: What is UnitsML +description: An overview of UnitsML β€” models for unambiguously encoding and identifying scientific units of measure and quantities +--- + +# What is UnitsML? + +UnitsML is a set of models for **unambiguously encoding and identifying scientific units of measure and quantities**, usable in XML and other markup languages. It provides structured schemas that allow different markup languages, information systems, and scientific disciplines to exchange data with clear, machine-readable unit definitions. + +## The problem UnitsML solves + +### Units are everywhere β€” and they're not easy + +In our physical world, units surround us. We compare distances, time, and weight effortlessly using an internal system of scales and references. "The grocery store is further away than the workplace." "The road bike is lighter than the mountain bike." + +But communicating units of measure is not as trivial as it appears. Consider these pitfalls: + +- **Code lists** contain an arbitrary set of units with fixed codes. They are typically static β€” only a selection of units is represented, and the format is rigid. +- **Symbols** are lightweight but become ambiguous outside SI. Consider `nm`: nanometers or nautical miles? +- **Names** are descriptive but not always standardized. Is a "pound" a US pound (~453.6 g), a metric pound (500 g), a troy pound, or an avoirdupois pound? + +### When units go wrong, the consequences are real + +
+
+
+ +
+

Mars Climate Orbiter (1999)

+

NASA lost the $125 million Mars Climate Orbiter because one engineering team used English units (pound-seconds) while another used metric units (newton-seconds) for thruster firings. The spacecraft entered Mars' atmosphere at the wrong trajectory and was destroyed.

+
+
+
+ +
+

Space Shuttle Discovery (1985)

+

During a Strategic Defense Initiative test, the shuttle Discovery flew upside-down over Maui because a guidance system expected units in nautical miles but received feet β€” 10,023 feet was interpreted as 10,023 nautical miles, pointing the mirror upward instead of down.

+
+
+ +These are not isolated incidents. In scientific data exchange, units are often: + +- **Implicit** β€” assumed from context but never stated +- **Ambiguous** β€” "lb" could mean pound-mass or pound-force +- **Inconsistent** β€” different databases use different code lists for the same unit +- **Lost in translation** β€” converting between systems introduces errors + +UnitsML addresses these problems by providing a **standard vocabulary** for defining units, quantities, dimensions, and their relationships β€” so that scientific data can be exchanged reliably between any systems that understand UnitsML. + +## What UnitsML provides + +### Unit definitions + +UnitsML can define any scientific unit of measure β€” SI base units, SI derived units, and non-SI units. Each unit includes: + +- A unique identifier (`xml:id`) +- One or more names and symbols (ASCII, Unicode, HTML, LaTeX, MathML representations) +- The unit system it belongs to (SI, CGS, inch-pound, etc.) +- Dimensional references for dimensional analysis +- Conversion factors to other units + +```xml + + metre + m + + The metre is the length of the path travelled by light in vacuum + during a time interval of 1/299 792 458 of a second. + + +``` + +### Dimensional analysis + +UnitsML links units to their **dimensional representations** in terms of the seven SI base quantities. This enables dimensional checking β€” verifying that unit conversions and calculations are physically meaningful. + +The seven SI base quantities and their corresponding units: + +| Base quantity | Unit name | Symbol | +|--------------|-----------|--------| +| length | metre | m | +| mass | kilogram | kg | +| time | second | s | +| electric current | ampere | A | +| thermodynamic temperature | kelvin | K | +| amount of substance | mole | mol | +| luminous intensity | candela | cd | + +For example, the dimension of force is **LΒ·MΒ·T⁻²** β€” length to the first power, mass to the first power, time to the negative second power. This is expressed in UnitsML as: + +```xml + + + + +``` + +### Conversion factors + +UnitsML provides **built-in conversion information** between units using a linear equation: + +**y = d + ((b / c) Γ— (x + a))** + +This covers the vast majority of unit conversions: + +```xml + +``` + +For non-linear conversions, UnitsML supports special conversion definitions and external service references. + +### Quantity definitions + +UnitsML defines quantities β€” measurable properties like length, mass, force, energy β€” and links them to the units that can express them: + +```xml + + length + l + +``` + +### Prefix support + +All 20 SI prefixes (yotta through yocto) plus binary prefixes (kibi through exbi) are supported, allowing derived units like kilometers, milligrams, and megahertz to be precisely defined: + +```xml + +``` + +### Counted items + +UnitsML includes support for **counted items** β€” things that are counted and combined with scientific units (e.g., "electrons per second", "particles per cubic meter"). A counted item is not itself a unit, but a dimensionless entity that can be combined with units. + +## The UnitsML schema + +The UnitsML XML Schema is maintained at [schema.unitsml.org](https://schema.unitsml.org) and defines five top-level containers: + +| Element | Purpose | +|---------|---------| +| `UnitSet` | Container for unit definitions | +| `CountedItemSet` | Container for counted items | +| `QuantitySet` | Container for quantity definitions | +| `DimensionSet` | Container for dimensional representations | +| `PrefixSet` | Container for SI and binary prefixes | + +Each container is independent β€” you can use `UnitSet` alone, or combine multiple containers as needed. This modular design makes it easy to incorporate just the parts of UnitsML your application requires. + +The current schema version is **1.0**, with namespace `https://schema.unitsml.org/unitsml/1.0`. + +## Designed for incorporation + +UnitsML is **not a standalone document format** β€” it is designed to be incorporated into other markup languages and data formats. This is a key design principle. You don't write "UnitsML documents"; instead, you add UnitsML markup to your existing formats. + +There are four ways to incorporate UnitsML into XML: + +1. **Reference** β€” Point to the UnitsML schema via `xsi:schemaLocation` without modifying it +2. **Import** β€” Use XSD `` to bring in UnitsML types and elements +3. **Include** β€” Use XSD `` to embed UnitsML definitions directly +4. **Redefine** β€” Use XSD `` to customize UnitsML elements for your domain + +See [Incorporating UnitsML](/learn/incorporating-unitsml) for detailed guidance on each approach. + +## UnitsDB β€” the units database + +UnitsDB is a comprehensive database of scientific units of measure, originally developed at NIST. It contains: + +- **SI base units** (metre, kilogram, second, ampere, kelvin, mole, candela) +- **SI derived units** with special names (newton, pascal, joule, watt, volt, etc.) +- **Non-SI units** acceptable for use with SI (litre, hour, day, electronvolt, etc.) +- **Non-SI units** from other systems (inch, foot, pound, BTU, etc.) +- **Prefixes** β€” all SI prefixes and binary prefixes +- **Quantities** β€” over 180 quantities with unit associations +- **Conversion factors** between units + +Browse the full interactive database at [unitsml.org/unitsdb](/unitsdb/). The [unitsml-ruby](/software/unitsml-ruby) gem provides programmatic access. + +## Relationship to the International System of Units (SI) + +UnitsML has a close relationship with the **International System of Units (SI)**, which is the modern form of the metric system and the world's most widely used system of measurement: + +- NIST is responsible for interpreting the SI for use in the United States (per NIST Special Publication 811) +- UnitsML's dimensional analysis is based on the seven SI base quantities +- UnitsML covers SI units, SI-acceptable non-SI units, and common non-SI units from other systems +- UnitsDB includes comprehensive SI unit definitions aligned with the *BIPM SI Brochure* + +The availability of a markup language for units allows for the unambiguous storage, exchange, and processing of numerical data, thus facilitating the collaboration and sharing of information. It is anticipated that UnitsML will be used by the developers of other markup languages to address the needs of specific communities β€” mathematics, chemistry, materials science, business and commerce. Use of UnitsML in other markup languages reduces duplication of effort and improves compatibility among specifications that represent numerical data. + +For authoritative guidance on SI usage, see [NIST SP 811](https://www.nist.gov/pml/special-publication-811) β€” *Guide for the Use of the International System of Units (SI)*. + +## Standards governance + +UnitsML has been developed through collaborative standardization: + +- **1998–2006**: Initial development at NIST (National Institute of Standards and Technology), with support from the SIMA (Systems Integration for Manufacturing Applications) program +- **2006–2016**: Development continued through an OASIS Technical Committee, which produced Committee Specification Drafts including UnitsML 1.0-CSD04 +- **2022–present**: Standards work continues under **CalConnect TC UNITS**, which maintains the schema, specifications, and related deliverables + +The schema namespace and hosting transitioned from NIST to the independent `schema.unitsml.org` domain, reflecting the project's maturation into a community-maintained standard. + +::: tip Historical note +UnitsML was originally hosted at `unitsml.nist.gov`. An OASIS Technical Committee was established in 2006 and completed its mandate in 2016. In 2022, governance transitioned to CalConnect TC UNITS. All OASIS-era working references have been updated to reflect current CalConnect stewardship. +::: + +## Next steps + +- [Who is UnitsML for?](/learn/who-is-it-for) β€” understand the target audiences and use cases +- [How UnitsML works](/learn/how-it-works) β€” dive into the technical architecture +- [Incorporating UnitsML](/learn/incorporating-unitsml) β€” learn how to add UnitsML to your XML formats +- [UnitsDB](/unitsdb/) β€” browse the complete interactive database +- [Get started](/get-started) β€” start using UnitsML in your projects + + diff --git a/learn/who-is-it-for.md b/learn/who-is-it-for.md new file mode 100644 index 0000000..b61b4f6 --- /dev/null +++ b/learn/who-is-it-for.md @@ -0,0 +1,223 @@ +--- +title: Who is UnitsML for +description: Target audiences, use cases, and real-world applications of UnitsML +--- + +# Who is UnitsML for? + +UnitsML is relevant to anyone who creates, exchanges, or processes scientific and engineering data that involves units of measure and quantities. This spans a wide range of disciplines and roles. + +## Target audiences + +### Standards developers and markup language designers + +If you're designing a markup language or data format for a scientific or engineering domain, UnitsML provides **ready-made markup for units of measure**. Instead of inventing your own unit representation, you can incorporate UnitsML elements directly into your schema. + +**Benefits:** +- Avoid reinventing unit representation for each domain +- Gain interoperability with other markup languages that use UnitsML +- Leverage existing unit definitions, conversions, and dimensional analysis + +**Examples:** MatML (materials data), CML (chemical markup), AnIML (analytical chemistry), GML (geography), domain-specific engineering formats. + +### Data exchange architects + +If you're building systems that exchange scientific data between organizations or disciplines, UnitsML provides a **common language for units** that eliminates ambiguity. + +**Benefits:** +- Unambiguous unit identification across systems +- Machine-readable conversion factors between unit systems +- Dimensional validation to catch data errors before they propagate + +**Examples:** Supply chain data exchange, laboratory information management systems, cross-disciplinary research data portals, emergency response data integration. + +### Database and software developers + +If you're building software that handles scientific measurements, UnitsML provides a **structured data model** for units that goes beyond simple string labels. + +**Benefits:** +- Precise unit definitions with symbols in 6 representations (ASCII, Unicode, HTML, LaTeX, MathML, id) +- Built-in conversion algorithms via linear equation factors +- Integration with [UnitsDB](/unitsdb/) for comprehensive unit data +- Programmatic access via the [unitsml-ruby](/software/unitsml-ruby) gem + +**Examples:** Scientific computing libraries, measurement instrument software, data validation tools, laboratory automation systems. + +### Scientific data managers + +If you manage scientific data repositories or archives, UnitsML enables **self-describing datasets** where units are explicitly defined rather than assumed from context. + +Modern laboratories generate vast quantities of measurement data from instruments using different unit conventions. When digitized analytical data is separated from metadata about how samples were collected and analyzed, the connection between scientific metadata and the data itself can be lost, rendering the data useless. + +**Benefits:** +- Datasets remain interpretable long after their original context is lost +- Automated unit validation and conversion +- Consistent metadata across heterogeneous data sources + +**Examples:** Government science agencies, research data repositories, environmental monitoring databases. + +### Standards bodies and regulatory organizations + +If your organization publishes standards involving scientific measurements, UnitsML provides an **authoritative mechanism** for encoding units in machine-readable form. + +**Benefits:** +- Normative reference for unit definitions +- Alignment with SI and NIST standards +- Machine-processable specifications + +**Examples:** NIST, ISO committees, CalConnect, industry consortia, national metrology institutes. + +## Real-world use cases + +### Emergency response data integration + +During emergencies, scientific data from disparate sources must be rapidly combined and interpreted. A radiation reading in "mSv/h" from one system must be correctly understood alongside a reading in "rem/h" from another. UnitsML provides the unambiguous definitions and conversion factors needed for reliable data fusion in time-critical situations. + +### Manufacturing supply chain specifications + +Technical specifications that accompany products through the manufacturing supply chain include physical properties β€” dimensions, tolerances, material properties β€” expressed in various units. When a supplier specifies a tolerance as "Β±0.005 in" and the buyer's system works in millimetres, UnitsML enables automatic, precise conversion without loss of accuracy. + +### Multi-disciplinary research collaboration + +Research projects spanning physics, chemistry, engineering, and biology encounter a bewildering variety of units. A chemistry dataset might use angstroms and electronvolts while an engineering dataset uses nanometres and joules. UnitsML provides a common framework that makes all units explicitly defined and convertible. + +### Laboratory data management + +Modern laboratories generate vast quantities of measurement data from instruments using different unit conventions. UnitsML enables: +- Automatic unit validation when importing data +- Consistent unit display across user interfaces +- Reliable data aggregation from multiple instruments and vendors +- Long-term data integrity through self-describing unit definitions + +### Geographic and environmental information systems + +GIS and environmental monitoring systems work with spatial units (metres, degrees, radians), temporal units (seconds, days, years), and derived units (m/s, kg/mΒ³, W/mΒ²). UnitsML provides a unified schema for all these unit types. + +### Analytical chemistry and spectroscopy + +The Analytical Information Markup Language (AnIML), developed by ASTM Subcommittee E13.15, is a real-world example of incorporating UnitsML into a domain-specific markup language for spectroscopy and chromatography data. AnIML uses UnitsML to handle all unit information, ensuring that analytical data remains self-describing and interchangeable across vendor platforms. + +## How different users enter the UnitsML ecosystem + +
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Standards developers
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+
Incorporate UnitsML into your XML schema via reference, import, include, or redefine
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Software developers
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Use the unitsml-ruby gem for programmatic access, or parse UnitsML XML with standard libraries
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Data managers
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Add UnitsML markup to existing datasets; use UnitsDB for authoritative unit definitions
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End users & researchers
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Browse units interactively at UnitsDB; use software that supports UnitsML natively
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+
+ +## Domains that benefit from UnitsML + +| Domain | Common units | Why UnitsML helps | +|--------|-------------|-------------------| +| Physics | m, kg, s, A, K, mol, cd, J, N, Pa | Base SI units and derived units with precise definitions | +| Chemistry | mol/L, eV, Γ…, Da, g/mol | Bridge between SI and domain-specific non-SI units | +| Engineering | MPa, kW, mm, Β΅m, rpm | Mixed SI and non-SI units with conversion factors | +| Metrology | All SI + derived | Authoritative definitions aligned with BIPM | +| Environmental science | Β΅g/mΒ³, ppb, Bq/mΒ³ | Complex derived units from multiple base quantities | +| Materials science | GPa, J/mΒ², nm, K/s | Combined units with dimensional analysis | +| Aerospace | ft, in, lbf, psi, Mach | Mixed unit systems requiring precise conversion | +| Healthcare | mg/dL, mmHg, mSv | Medical units with non-trivial conversion factors | +| Analytical chemistry | Β΅g/L, mAU, m/z | Instrument-specific units needing standardization | + +## Adoption path + +The use of UnitsML is **completely optional** β€” it's designed to add value where it's needed, not to force migration of existing systems. In many cases, existing systems have already developed domain-specific markup or codes for handling units, and it may not be practical to convert such systems to use UnitsML. However, the advantages β€” ready-made markup for units, improved interoperability β€” should provide a compelling case for new projects. + +Many organizations adopt UnitsML incrementally: + +1. **Reference** β€” Start by referencing UnitsML definitions for units in new data formats +2. **Integrate** β€” Add UnitsML elements to existing XML schemas +3. **Automate** β€” Use UnitsDB and conversion tools for automated processing +4. **Standardize** β€” Mandate UnitsML in data exchange agreements and specifications + +## Next steps + +- [What is UnitsML?](/learn/what-is-unitsml) β€” understand the core concepts +- [How UnitsML works](/learn/how-it-works) β€” see the technical architecture in detail +- [Incorporating UnitsML](/learn/incorporating-unitsml) β€” four methods of integration +- [UnitsDB](/unitsdb/) β€” browse the complete interactive database +- [Get started](/get-started) β€” begin using UnitsML in your projects + + diff --git a/lychee.toml b/lychee.toml new file mode 100644 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a/parent-hub/assets/symbol.svg +++ /dev/null @@ -1 +0,0 @@ - \ No newline at end of file diff --git a/parent-hub/title.html b/parent-hub/title.html deleted file mode 100644 index af45d63..0000000 --- a/parent-hub/title.html +++ /dev/null @@ -1 +0,0 @@ -UnitsML group diff --git a/privacy.md b/privacy.md new file mode 100644 index 0000000..c31a785 --- /dev/null +++ b/privacy.md @@ -0,0 +1,3 @@ +# Privacy Policy + +To be provided. diff --git a/assets/android-chrome-192x192.png b/public/android-chrome-192x192.png similarity index 100% rename from assets/android-chrome-192x192.png rename to public/android-chrome-192x192.png diff --git a/assets/android-chrome-512x512.png b/public/android-chrome-512x512.png similarity index 100% rename from assets/android-chrome-512x512.png rename to public/android-chrome-512x512.png diff --git a/assets/apple-touch-icon.png b/public/apple-touch-icon.png similarity index 100% rename from assets/apple-touch-icon.png rename to public/apple-touch-icon.png diff --git a/assets/browserconfig.xml b/public/browserconfig.xml similarity index 100% rename from assets/browserconfig.xml rename to public/browserconfig.xml diff --git a/assets/favicon-16x16.png b/public/favicon-16x16.png similarity index 100% rename from assets/favicon-16x16.png rename to public/favicon-16x16.png diff --git a/assets/favicon-192x192.png b/public/favicon-192x192.png similarity index 100% rename from assets/favicon-192x192.png rename to public/favicon-192x192.png diff --git a/assets/favicon-32x32.png b/public/favicon-32x32.png similarity index 100% rename from assets/favicon-32x32.png rename to public/favicon-32x32.png diff --git a/assets/favicon.ico b/public/favicon.ico similarity index 100% rename from assets/favicon.ico rename to public/favicon.ico diff --git a/assets/favicon.png b/public/favicon.png similarity index 100% rename from assets/favicon.png rename to public/favicon.png diff --git a/public/favicon.svg b/public/favicon.svg new file mode 100644 index 0000000..62351fb --- /dev/null +++ b/public/favicon.svg @@ -0,0 +1 @@ +U diff --git a/assets/logo-text.svg b/public/logo-text.svg similarity index 100% rename from assets/logo-text.svg rename to public/logo-text.svg diff --git a/assets/mstile-150x150.png b/public/mstile-150x150.png similarity index 100% rename from assets/mstile-150x150.png rename to public/mstile-150x150.png diff --git a/assets/ref-docs/Improving_Interoperability_by_Incorporating_UnitsM.pdf b/public/ref-docs/Improving_Interoperability_by_Incorporating_UnitsM.pdf similarity index 100% rename from assets/ref-docs/Improving_Interoperability_by_Incorporating_UnitsM.pdf rename to public/ref-docs/Improving_Interoperability_by_Incorporating_UnitsM.pdf diff --git a/assets/ref-docs/UnitsML-Guide-v1.0-wd01.pdf b/public/ref-docs/UnitsML-Guide-v1.0-wd01.pdf similarity index 100% rename from assets/ref-docs/UnitsML-Guide-v1.0-wd01.pdf rename to public/ref-docs/UnitsML-Guide-v1.0-wd01.pdf diff --git a/assets/ref-docs/UnitsML-Santa-Fe-2003.ppt b/public/ref-docs/UnitsML-Santa-Fe-2003.ppt similarity index 100% rename from assets/ref-docs/UnitsML-Santa-Fe-2003.ppt rename to public/ref-docs/UnitsML-Santa-Fe-2003.ppt diff --git a/assets/ref-docs/UnitsML-v1.0-csd02.xsd.xml b/public/ref-docs/UnitsML-v1.0-csd02.xsd.xml similarity index 100% rename from assets/ref-docs/UnitsML-v1.0-csd02.xsd.xml rename to public/ref-docs/UnitsML-v1.0-csd02.xsd.xml diff --git a/assets/ref-docs/UnitsML_Guidelines_DraftVersion_0.4.doc b/public/ref-docs/UnitsML_Guidelines_DraftVersion_0.4.doc similarity index 100% rename from assets/ref-docs/UnitsML_Guidelines_DraftVersion_0.4.doc rename to public/ref-docs/UnitsML_Guidelines_DraftVersion_0.4.doc diff --git a/assets/robots.txt b/public/robots.txt similarity index 100% rename from assets/robots.txt rename to public/robots.txt diff --git a/assets/site.webmanifest b/public/site.webmanifest similarity index 100% rename from assets/site.webmanifest rename to public/site.webmanifest diff --git a/assets/symbol.svg b/public/symbol.svg similarity index 100% rename from assets/symbol.svg rename to public/symbol.svg diff --git a/public/unitsdb/context.jsonld b/public/unitsdb/context.jsonld new file mode 100644 index 0000000..1954741 --- /dev/null +++ b/public/unitsdb/context.jsonld @@ -0,0 +1,24 @@ +{ + "@context": { + "@vocab": "https://unitsml.org/ontology/", + "unit": "https://unitsml.org/ontology/unit/", + "quantity": "https://unitsml.org/ontology/quantity/", + "dimension": "https://unitsml.org/ontology/dimension/", + "prefix": "https://unitsml.org/ontology/prefix/", + "scale": "https://unitsml.org/ontology/scale/", + "unitSystem": "https://unitsml.org/ontology/unitSystem/", + "schema": "http://schema.org/", + "name": "schema:name", + "identifier": "schema:identifier", + "description": "schema:description", + "symbol": "https://unitsml.org/ontology/symbol", + "rootUnit": "https://unitsml.org/ontology/rootUnit", + "quantityReference": "https://unitsml.org/ontology/quantityReference", + "dimensionReference": "https://unitsml.org/ontology/dimensionReference", + "scaleReference": "https://unitsml.org/ontology/scaleReference", + "unitSystemReference": "https://unitsml.org/ontology/unitSystemReference", + "prefixReference": "https://unitsml.org/ontology/prefixReference", + "power": "https://unitsml.org/ontology/power", + "base": "https://unitsml.org/ontology/base" + } +} \ No newline at end of file diff --git a/public/unitsdb/dimension.jsonld b/public/unitsdb/dimension.jsonld new file mode 100644 index 0000000..01f6aca --- /dev/null +++ b/public/unitsdb/dimension.jsonld @@ -0,0 +1,2951 @@ +{ + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@graph": [ + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/dimension/d:length", + "@type": "Dimension", + "name": "length", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "NISTd1" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "d:length" + } + ], + "expression": "L", + "dimensionalComposition": [ + { + "key": "length", + "symbol": "L", + "power": 1 + } + ] + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/dimension/d:volume", + "@type": "Dimension", + "name": "volume", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "NISTd10" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "d:volume" + } + ], + "expression": "L3", + "dimensionalComposition": [ + { + "key": "length", + "symbol": "L", + "power": 3 + } + ] + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/dimension/d:traffic_intensity", + "@type": "Dimension", + "name": "traffic intensity", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "NISTd100" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "d:traffic_intensity" + } + ], + "expression": "1", + "dimensionless": true + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/dimension/d:symbol_rate", + "@type": "Dimension", + "name": "symbol rate", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "NISTd101" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "d:symbol_rate" + } + ], + "expression": "T-1", + "dimensionalComposition": [ + { + "key": "time", + "symbol": "T", + "power": -1 + } + ] + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/dimension/d:information_content", + "@type": "Dimension", + "name": "information content", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "NISTd102" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "d:information_content" + } + ], + "expression": "1", + 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"Y", + "base": 10, + "power": 24, + "value": 1e+24 + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/prefix/p:ronna", + "@type": "Prefix", + "name": "ronna", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "NISTp10_27" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "p:ronna" + } + ], + "symbol": "R", + "base": 10, + "power": 27, + "value": 1e+27 + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/prefix/p:kilo", + "@type": "Prefix", + "name": "kilo", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "NISTp10_3" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "p:kilo" + } + ], + "symbol": "k", + "base": 10, + "power": 3, + "value": 1000 + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/prefix/p:quetta", + "@type": "Prefix", + "name": "quetta", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "NISTp10_30" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "p:quetta" + } + ], + "symbol": "Q", + "base": 10, + "power": 30, + "value": 1e+30 + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/prefix/p:mega", + "@type": "Prefix", + "name": "mega", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "NISTp10_6" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "p:mega" + } + ], + "symbol": "M", + "base": 10, + "power": 6, + "value": 1000000 + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/prefix/p:giga", + "@type": "Prefix", + "name": "giga", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "NISTp10_9" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "p:giga" + } + ], + "symbol": "G", + "base": 10, + "power": 9, + "value": 1000000000 + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/prefix/p:kibi", + "@type": "Prefix", + "name": "kibi", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "NISTp2_10" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "p:kibi" + } + ], + "symbol": "Ki", + "base": 2, + "power": 10, + "value": 1024 + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/prefix/p:mebi", + "@type": "Prefix", + "name": "mebi", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "NISTp2_20" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "p:mebi" + } + ], + "symbol": "Mi", + "base": 2, + "power": 20, + "value": 1048576 + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/prefix/p:gibi", + "@type": "Prefix", + "name": "gibi", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "NISTp2_30" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "p:gibi" + } + ], + "symbol": "Gi", + "base": 2, + "power": 30, + "value": 1073741824 + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/prefix/p:tebi", + "@type": "Prefix", + "name": "tebi", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "NISTp2_40" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "p:tebi" + } + ], + "symbol": "Ti", + "base": 2, + "power": 40, + "value": 1099511627776 + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/prefix/p:pebi", + "@type": "Prefix", + "name": "pebi", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "NISTp2_50" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "p:pebi" + } + ], + "symbol": "Pi", + "base": 2, + "power": 50, + "value": 1125899906842624 + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/prefix/p:exbi", + "@type": "Prefix", + "name": "exbi", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "NISTp2_60" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "p:exbi" + } + ], + "symbol": "Ei", + "base": 2, + "power": 60, + "value": 1152921504606847000 + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/prefix/p:zebi", + "@type": "Prefix", + "name": "zebi", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "NISTp2_70" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "p:zebi" + } + ], + "symbol": "Zi", + "base": 2, + "power": 70, + "value": 1.1805916207174113e+21 + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/prefix/p:yobi", + "@type": "Prefix", + "name": "yobi", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "NISTp2_80" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "p:yobi" + } + ], + "symbol": "Yi", + "base": 2, + "power": 80, + "value": 1.2089258196146292e+24 + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/scale/continuous_ratio", + "@type": "Scale", + "name": "continuous ratio scale", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "continuous_ratio" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "s:continuous_ratio" + } + ], + "properties": { + "continuous": true, + "ordered": true, + "logarithmic": false, + "interval": true, + "ratio": true + } + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/scale/continuous_interval", + "@type": "Scale", + "name": "continuous interval scale", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "continuous_interval" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "s:continuous_interval" + } + ], + "properties": { + "continuous": true, + "ordered": true, + "logarithmic": false, + "interval": true, + "ratio": false + } + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/scale/logarithmic_ratio", + "@type": "Scale", + "name": "logarithmic ratio scale", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "logarithmic_ratio" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "s:logarithmic_ratio" + } + ], + "properties": { + "continuous": true, + "ordered": true, + "logarithmic": true, + "interval": true, + "ratio": true + } + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/scale/logarithmic_field", + "@type": "Scale", + "name": "logarithmic field scale", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "logarithmic_field" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "s:logarithmic_field" + } + ], + "properties": { + "continuous": true, + "ordered": true, + "logarithmic": true, + "interval": true, + "ratio": false + } + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/scale/discrete", + "@type": "Scale", + "name": "discrete scale", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "discrete" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "s:discrete" + } + ], + "properties": { + "continuous": false, + "ordered": true, + "logarithmic": false, + "interval": true, + "ratio": true + } + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/unit-system/us:si-base", + "@type": "UnitSystem", + "name": "SI base units", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "SI_base" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "us:si-base" + } + ], + "short": "si-base" + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/unit-system/us:si-compatible", + "@type": "UnitSystem", + "name": "Units compatible with SI", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "SI_compatible" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "us:si-compatible" + } + ], + "short": "si-compatible" + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/unit-system/us:si-derived-nonspecial", + "@type": "UnitSystem", + "name": "SI-derived units non-special", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "SI_derived_non-special" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "us:si-derived-nonspecial" + } + ], + "short": "si-derived-nonspecial" + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/unit-system/us:si-derived-special", + "@type": "UnitSystem", + "name": "SI-derived units special", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "SI_derived_special" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "us:si-derived-special" + } + ], + "short": "si-derived-special" + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/unit-system/us:nonsi-acceptable", + "@type": "UnitSystem", + "name": "non-SI but acceptable", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "non-SI_acceptable" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "us:nonsi-acceptable" + } + ], + "short": "nonsi-acceptable" + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/unit-system/us:nonsi-nist-acceptable", + "@type": "UnitSystem", + "name": "non-SI but acceptable by NIST SP 811", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "non-SI_nist_acceptable" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "us:nonsi-nist-acceptable" + } + ], + "short": "nonsi-nist-acceptable" + }, + { + "@context": "https://unitsml.org/unitsdb/context.jsonld", + "@id": "https://unitsml.org/unit-system/us:nonsi-unacceptable", + "@type": "UnitSystem", + "name": "non-SI and not acceptable", + "identifier": [ + { + "@type": "PropertyValue", + "propertyID": "nist", + "value": "non-SI_not_acceptable" + }, + { + "@type": "PropertyValue", + "propertyID": "unitsml", + "value": "us:nonsi-unacceptable" + } + ], + "short": "nonsi-unacceptable" + } + ] +} \ No newline at end of file diff --git a/schemas.md b/schemas.md new file mode 100644 index 0000000..74c14c3 --- /dev/null +++ b/schemas.md @@ -0,0 +1,131 @@ +--- +title: Schemas +description: Schema definitions for UnitsML and UnitsDB +--- + +# Schemas + +UnitsML provides two complementary sets of schema definitions for encoding and validating scientific units of measure. + +## UnitsML XML Schemas + +
+ + + View on GitHub + + + + Browse at schema.unitsml.org + +
+ +Authoritative XML schemas (XSD) for encoding scientific units of measure in XML documents. UnitsML XML Schemas validate XML documents that use UnitsML markup, covering SI base units, derived units, and non-SI units. + +The schema is designed to be used **in combination with other specific schemas** through XML namespaces β€” not as a standalone schema. Developers of other markup languages incorporate UnitsML to address the needs of specific communities such as mathematics, chemistry, and materials science. + +### Supported unit types + +
+
+
+ +
+

SI Base & Special Derived

+

meter, second, joule, volt, kilogram, ampere, kelvin, mole, candela

+
+
+
+ +
+

SI Derived Units

+

square meter, meter per second, newton, pascal, watt, hertz, and more

+
+
+
+ +
+

Non-SI Units

+

minute, angstrom, inch, pound, calorie, atmosphere, and others

+
+
+ +### Schema versions + +| Version | Status | Description | +|---------|--------|-------------| +| UnitsML 1.0 | **Current** | Latest stable release | +| UnitsML 1.0-CSD04 | Draft | Committee Specification Draft 04 | +| UnitsML 0.9.x | Historical | Earlier development versions | +| UnitsML-Lite | Deprecated | Simplified subset | + +## UnitsDB YAML Schemas + +
+ + + View schemas on GitHub + + + + Browse UnitsDB data + +
+ +YAML schemas that define the structure and validation rules for UnitsDB β€” the authoritative database of scientific units. Each schema validates one of the six entity types: + +| Schema | Entity | Defines | +|--------|--------|---------| +| `units-schema.yaml` | **Unit** | Measurement units with identifiers, symbols, scale/system references, dimensional composition | +| `quantities-schema.yaml` | **Quantity** | Measurable properties (length, mass, force) with dimension references | +| `dimensions-schema.yaml` | **Dimension** | SI base quantity dimensional powers (L, M, T, I, Θ, N, J) | +| `prefixes-schema.yaml` | **Prefix** | SI decimal (kilo, milli) and binary (kibi, mebi) scaling factors | +| `scales-schema.yaml` | **Scale** | Measurement scale properties (continuous, ordered, logarithmic, interval, ratio) | +| `unit_systems-schema.yaml` | **Unit System** | Systems of measurement (SI, CGS) with base unit definitions | + +### Shared patterns + +All entity schemas share common structures: + +- **`identifiers[]`** β€” Cross-system IDs with `type` enum (nist, unitsml, ucum, si-digital-framework) +- **`names[]`** β€” Multilingual names with ISO language codes +- **`references[]`** β€” Informative and normative external references + +Unit, Prefix, and Dimension schemas include **6-format symbol representations**: `latex`, `unicode`, `ascii`, `html`, `id`, `mathml`. + +## Related resources + +- [UnitsDB](/unitsdb/) β€” browse the complete database with 716 entities +- [How UnitsML Works](/learn/how-it-works) β€” technical architecture overview +- [UnitsML Guide](/learn/guide) β€” usage guide with examples +- [unitsml-ruby](/software/unitsml-ruby) β€” Ruby gem for programmatic access + + diff --git a/scripts/generate-unitsdb.ts b/scripts/generate-unitsdb.ts new file mode 100644 index 0000000..1697de8 --- /dev/null +++ b/scripts/generate-unitsdb.ts @@ -0,0 +1,627 @@ +/** + * Generate enriched UnitsDB index.json and JSON-LD files from YAML source. + * + * Usage: npx tsx scripts/generate-unitsdb.ts + * + * Reads from: ../unitsdb/*.yaml + * Writes to: public/unitsdb/ + */ + +import * as fs from 'node:fs' +import * as path from 'node:path' +import * as yaml from 'js-yaml' + +// ── Paths ── + +const SCRIPT_DIR = path.dirname(new URL(import.meta.url).pathname) +const SITE_ROOT = path.resolve(SCRIPT_DIR, '..') +const DB_PATH = path.resolve(SITE_ROOT, '..', 'unitsdb') +const OUT_PATH = path.resolve(SITE_ROOT, 'public', 'unitsdb') + +// ── YAML loader ── + +function loadYaml(name: string): T { + const raw = fs.readFileSync(path.join(DB_PATH, `${name}.yaml`), 'utf-8') + return yaml.load(raw) as T +} + +// ── Helpers ── + +function firstName(names: any[]): string { + if (!names || !names.length) return '?' + return names[0]?.value ?? '?' +} + +interface SymMap { [fmt: string]: string } + +function extractSymbols(symField: any): SymMap { + const result: SymMap = {} + if (!symField) return result + if (Array.isArray(symField)) { + for (const s of symField) { + for (const fmt of ['unicode', 'ascii', 'html', 'latex', 'id', 'mathml']) { + if (s[fmt] !== undefined && s[fmt] !== null) result[fmt] = s[fmt] + } + } + } else if (typeof symField === 'object') { + Object.assign(result, symField) + } + return result +} + +function firstSym(sm: SymMap): string { + return sm.unicode ?? sm.ascii ?? '' +} + +function findUnitsmlId(identifiers: any[]): string { + const found = identifiers?.find((i: any) => i.type === 'unitsml') + return found?.id ?? identifiers?.[0]?.id ?? '?' +} + +// ── Main ── + +interface DimInfo { + id: string + name: string + expression: string + components: { key: string; symbol: string; power: number }[] + dimensionless: boolean +} + +interface QtyInfo { + name: string + type: string + dimension: DimInfo | null +} + +interface PrefixInfo { + name: string + symbol: string + symbols: SymMap + base: number + power: number + value: number +} + +interface ScaleInfo { + name: string + properties: Record + description: string[] +} + +interface SystemInfo { + name: string + short: string + acceptable: boolean | null + base_units: any[] +} + +function main() { + // ── Load all YAML data ── + const unitsData: any = loadYaml('units') + const quantitiesData: any = loadYaml('quantities') + const dimensionsData: any = loadYaml('dimensions') + const prefixesData: any = loadYaml('prefixes') + const scalesData: any = loadYaml('scales') + const systemsData: any = loadYaml('unit_systems') + + // ── Build prefix lookup ── + const prefixMap: Record = {} + for (const p of prefixesData.prefixes) { + const pid: string = p.identifiers[0].id + const sym = extractSymbols(p.symbols) + prefixMap[pid] = { + name: firstName(p.names), + symbol: firstSym(sym), + symbols: sym, + base: p.base ?? 10, + power: p.power ?? 0, + value: (p.base ?? 10) ** (p.power ?? 0), + } + } + + // ── Build dimension lookup ── + const dimMap: Record = {} + const DIM_KEYS = [ + 'length', 'mass', 'time', 'electric_current', + 'thermodynamic_temperature', 'amount_of_substance', + 'luminous_intensity', 'plane_angle', + ] + for (const d of dimensionsData.dimensions) { + const did: string = d.identifiers[0].id + const components: DimInfo['components'] = [] + for (const key of DIM_KEYS) { + const comp = d[key] + if (comp && (comp.power ?? 0) !== 0) { + components.push({ key, symbol: comp.symbol ?? '', power: comp.power }) + } + } + const isDimensionless = d.dimensionless === true + let expression: string + if (isDimensionless) { + expression = '1' + } else { + const parts = components.map(c => + c.power === 1 ? c.symbol : `${c.symbol}${c.power}` + ) + expression = parts.length ? parts.join('Β·') : 'β€”' + } + dimMap[did] = { + id: did, + name: firstName(d.names), + expression, + components, + dimensionless: isDimensionless, + } + } + + // ── Build quantity lookup ── + const qtyMap: Record = {} + for (const q of quantitiesData.quantities) { + const qid: string = q.identifiers[0].id + const dimRef = q.dimension_reference + const dimId = dimRef?.id ?? null + const dimInfo = dimId ? dimMap[dimId] ?? null : null + qtyMap[qid] = { + name: firstName(q.names), + type: q.quantity_type ?? 'derived', + dimension: dimInfo, + } + } + + // ── Build scale lookup ── + const scaleMap: Record = {} + for (const s of scalesData.scales) { + const sid: string = s.identifiers[0].id + const refs = s.references + const desc = refs?.informative ?? (Array.isArray(refs) ? refs : []) + scaleMap[sid] = { + name: firstName(s.names), + properties: s.properties ?? {}, + description: Array.isArray(desc) ? desc : [], + } + } + + // ── Build unit system lookup (indexed by ALL identifiers + short name) ── + const systemMap: Record = {} + const systemPrimaryId: Record = {} // any id β†’ primary NIST id + for (const us of systemsData.unit_systems) { + const primaryId: string = us.identifiers[0].id + const info: SystemInfo = { + name: firstName(us.names), + short: us.short ?? primaryId, + acceptable: us.acceptable ?? null, + base_units: us.base_units ?? [], + } + for (const ident of us.identifiers) { + systemMap[ident.id] = info + systemPrimaryId[ident.id] = primaryId + } + // Also index by short name (units reference systems by short name) + if (us.short) { + systemMap[us.short] = info + systemPrimaryId[us.short] = primaryId + } + } + + // ── Build unit lookup for root_units resolution ── + const unitLookup: Record = {} + for (const u of unitsData.units) { + const uid: string = u.identifiers[0].id + const sym = extractSymbols(u.symbols) + unitLookup[uid] = { name: firstName(u.names), symbol: firstSym(sym) } + } + + // ── Process units ── + const unitsOut: any[] = [] + for (const u of unitsData.units) { + const uid: string = u.identifiers[0].id + const sym = extractSymbols(u.symbols) + const namesList = (u.names ?? []).map((n: any) => ({ + value: n.value ?? '', lang: n.lang ?? 'en', + })) + + // Quantity references (handle singular/plural) + let qtyRefs = u.quantity_references ?? u.quantity_reference ?? [] + if (qtyRefs && !Array.isArray(qtyRefs)) qtyRefs = [qtyRefs] + const quantities = (qtyRefs ?? []) + .map((qr: any) => { + const qid = qr?.id + if (!qid || !qtyMap[qid]) return null + return { id: qid, name: qtyMap[qid].name, type: qtyMap[qid].type } + }) + .filter(Boolean) + + // Dimension from first quantity + let dimension: any = null + if (quantities.length) { + const qid = quantities[0].id + if (qtyMap[qid]?.dimension) { + dimension = qtyMap[qid].dimension + } + } + + // Scale + const scaleRef = u.scale_reference + const scaleId = scaleRef?.id ?? null + const scaleInfo = (scaleId && scaleMap[scaleId]) + ? { id: scaleId, name: scaleMap[scaleId].name } + : null + + // Systems (normalize to primary NIST ID, add parent system membership) + let sysRefs = u.unit_system_reference ?? [] + if (sysRefs && !Array.isArray(sysRefs)) sysRefs = [sysRefs] + const systems: { id: string; name: string; short: string; acceptable: boolean | null }[] = (sysRefs ?? []) + .map((sr: any) => { + const sid = sr?.id + if (!sid || !systemMap[sid]) return null + const sm = systemMap[sid] + const normalizedId = systemPrimaryId[sid] ?? sid + return { id: normalizedId, name: sm.name, short: sm.short, acceptable: sm.acceptable } + }) + .filter(Boolean) + + // SI sub-system units are also members of SI_compatible + const SI_PARENT = 'SI_compatible' + const SI_SUBSYSTEMS = ['SI_base', 'SI_derived_special', 'SI_derived_non-special'] + const hasSI = systems.some(s => SI_SUBSYSTEMS.includes(s.id)) + if (hasSI && !systems.some(s => s.id === SI_PARENT) && systemMap[SI_PARENT]) { + const parent = systemMap[SI_PARENT] + systems.push({ id: SI_PARENT, name: parent.name, short: parent.short, acceptable: parent.acceptable }) + } + + // Root units (with prefix resolution!) + const rootUnitsRaw = u.root_units + let rootUnits: any[] | null = null + if (rootUnitsRaw && rootUnitsRaw.length) { + rootUnits = rootUnitsRaw.map((ru: any) => { + // Unit reference + const unitRef = ru.unit_reference + const unitId = unitRef?.id ?? null + const unitInfo = unitId && unitLookup[unitId] + ? { id: unitId, ...unitLookup[unitId] } + : { id: unitId ?? '?', name: unitId ?? '?', symbol: '?' } + + // Prefix reference + const prefRef = ru.prefix_reference + let prefixInfo = null + if (prefRef?.id && prefixMap[prefRef.id]) { + const pm = prefixMap[prefRef.id] + prefixInfo = { id: prefRef.id, name: pm.name, symbol: pm.symbol } + } + + return { power: ru.power ?? 1, unit: unitInfo, prefix: prefixInfo } + }) + } + + // Identifiers + const identifiers = (u.identifiers ?? []).map((i: any) => ({ + type: i.type ?? '', id: i.id ?? '', + })) + + // External references (BIPM, UCUM, QUDT, etc.) + const references = (u.references ?? []).map((r: any) => ({ + type: r.type ?? '', authority: r.authority ?? '', uri: r.uri ?? '', + })) + + unitsOut.push({ + id: uid, + unitsml_id: findUnitsmlId(identifiers), + name: firstName(u.names), + names: namesList, + symbols: sym, + identifiers, + references, + short: u.short ?? '', + root: u.root ?? false, + composite: rootUnits !== null, + quantities, + dimension, + scale: scaleInfo, + systems, + root_units: rootUnits, + }) + } + + // ── Process quantities ── + const quantitiesOut: any[] = [] + for (const q of quantitiesData.quantities) { + const qid: string = q.identifiers[0].id + const dimRef = q.dimension_reference + const dimId = dimRef?.id ?? null + const dimInfo = dimId ? dimMap[dimId] ?? null : null + + // Find units that measure this quantity + const relatedUnits: any[] = [] + for (const u of unitsOut) { + if (u.quantities.some((q2: any) => q2.id === qid)) { + relatedUnits.push({ id: u.id, name: u.name, symbol: firstSym(u.symbols) }) + } + } + + const identifiers = (q.identifiers ?? []).map((i: any) => ({ + type: i.type ?? '', id: i.id ?? '', + })) + const references = (q.references ?? []).map((r: any) => ({ + type: r.type ?? '', authority: r.authority ?? '', uri: r.uri ?? '', + })) + + quantitiesOut.push({ + id: qid, + unitsml_id: findUnitsmlId(identifiers), + name: firstName(q.names), + names: (q.names ?? []).map((n: any) => ({ value: n.value ?? '', lang: n.lang ?? 'en' })), + short: q.short ?? '', + type: q.quantity_type ?? 'derived', + dimension: dimInfo, + units: relatedUnits, + unit_count: relatedUnits.length, + identifiers, + references, + }) + } + + // ── Process dimensions ── + const dimensionsOut: any[] = [] + for (const d of dimensionsData.dimensions) { + const did: string = d.identifiers[0].id + const info = dimMap[did] + const relatedQtys = quantitiesOut + .filter(q => q.dimension?.id === did) + .map(q => ({ id: q.id, name: q.name })) + + const identifiers = (d.identifiers ?? []).map((i: any) => ({ + type: i.type ?? '', id: i.id ?? '', + })) + + dimensionsOut.push({ + id: did, + unitsml_id: findUnitsmlId(identifiers), + name: info.name, + names: (d.names ?? []).map((n: any) => ({ value: n.value ?? '', lang: n.lang ?? 'en' })), + expression: info.expression, + dimensionless: info.dimensionless, + components: info.components, + quantities: relatedQtys, + identifiers, + references: (d.references ?? []).map((r: any) => ({ + type: r.type ?? '', authority: r.authority ?? '', uri: r.uri ?? '', + })), + }) + } + + // ── Process prefixes ── + const prefixesOut: any[] = [] + for (const p of prefixesData.prefixes) { + const pid: string = p.identifiers[0].id + const info = prefixMap[pid] + const relatedUnits: any[] = [] + for (const u of unitsOut) { + if (u.root_units?.some((ru: any) => ru.prefix?.id === pid)) { + relatedUnits.push({ id: u.id, name: u.name, symbol: firstSym(u.symbols) }) + } + } + + const identifiers = (p.identifiers ?? []).map((i: any) => ({ + type: i.type ?? '', id: i.id ?? '', + })) + + prefixesOut.push({ + id: pid, + unitsml_id: findUnitsmlId(identifiers), + name: info.name, + symbol: info.symbol, + symbols: info.symbols, + factor: `${info.base}^${info.power}`, + base: info.base, + power: info.power, + value: info.value, + units: relatedUnits, + identifiers, + references: (p.references ?? []).map((r: any) => ({ + type: r.type ?? '', authority: r.authority ?? '', uri: r.uri ?? '', + })), + }) + } + + // ── Process scales ── + const scalesOut: any[] = [] + for (const s of scalesData.scales) { + const sid: string = s.identifiers[0].id + const info = scaleMap[sid] + const unitCount = unitsOut.filter(u => u.scale?.id === sid).length + const identifiers = (s.identifiers ?? []).map((i: any) => ({ + type: i.type ?? '', id: i.id ?? '', + })) + + scalesOut.push({ + id: sid, + unitsml_id: findUnitsmlId(identifiers), + name: info.name, + properties: info.properties, + description: info.description, + unit_count: unitCount, + identifiers, + }) + } + + // ── Process unit systems ── + const systemsOut: any[] = [] + for (const us of systemsData.unit_systems) { + const usid: string = us.identifiers[0].id + const info = systemMap[usid] + const unitCount = unitsOut.filter(u => u.systems?.some((s: any) => s.id === usid)).length + const identifiers = (us.identifiers ?? []).map((i: any) => ({ + type: i.type ?? '', id: i.id ?? '', + })) + + systemsOut.push({ + id: usid, + unitsml_id: findUnitsmlId(identifiers), + name: info.name, + short: info.short, + acceptable: info.acceptable, + unit_count: unitCount, + identifiers, + base_units: info.base_units, + }) + } + + // ── Stats ── + const stats = { + units: unitsOut.length, + quantities: quantitiesOut.length, + dimensions: dimensionsOut.length, + prefixes: prefixesOut.length, + scales: scalesOut.length, + unit_systems: systemsOut.length, + total: unitsOut.length + quantitiesOut.length + dimensionsOut.length + prefixesOut.length + scalesOut.length + systemsOut.length, + units_root: unitsOut.filter(u => u.root).length, + units_composite: unitsOut.filter(u => u.composite).length, + quantities_base: quantitiesOut.filter(q => q.type === 'base').length, + quantities_derived: quantitiesOut.filter(q => q.type === 'derived').length, + prefixes_decimal: prefixesOut.filter(p => p.base === 10).length, + prefixes_binary: prefixesOut.filter(p => p.base === 2).length, + } + + // ── Write index.json ── + fs.mkdirSync(OUT_PATH, { recursive: true }) + const index = { + meta: { + source: 'https://github.com/unitsml/unitsdb', + version: '2.0.0', + schema_site: 'https://schema.unitsml.org', + generated: new Date().toISOString().slice(0, 10), + }, + stats, + units: unitsOut, + quantities: quantitiesOut, + dimensions: dimensionsOut, + prefixes: prefixesOut, + scales: scalesOut, + unit_systems: systemsOut, + } + + // Full index (kept for backward compat / JSON API link) + writeJson('index.json', index) + + // Lightweight stats file for instant page load + writeJson('stats.json', { meta: index.meta, stats }) + + // Per-type files for lazy loading + const typeFiles: Record = { + units: unitsOut, + quantities: quantitiesOut, + dimensions: dimensionsOut, + prefixes: prefixesOut, + scales: scalesOut, + unit_systems: systemsOut, + } + for (const [key, items] of Object.entries(typeFiles)) { + writeJson(`${key}.json`, items) + } + + console.log(`Stats: ${JSON.stringify(stats, null, 2)}`) + + // Verify prefix resolution + let prefixCount = 0 + for (const u of unitsOut) { + for (const ru of u.root_units ?? []) { + if (ru.prefix) prefixCount++ + } + } + console.log(`Units with prefix in root_units: ${prefixCount}`) + + // ── Generate JSON-LD files ── + const BASE = 'https://unitsml.org' + const CTX = `${BASE}/unitsdb/context.jsonld` + + const pathSeg: Record = { + units: 'unit', quantities: 'quantity', dimensions: 'dimension', + prefixes: 'prefix', scales: 'scale', unit_systems: 'unit-system', + } + const typeMap: Record = { + units: 'Unit', quantities: 'Quantity', dimensions: 'Dimension', + prefixes: 'Prefix', scales: 'Scale', unit_systems: 'UnitSystem', + } + + function toLd(key: string, e: any): any { + const seg = pathSeg[key] + const o: any = { + '@context': CTX, + '@id': `${BASE}/${seg}/${e.unitsml_id || e.id}`, + '@type': typeMap[key], + name: e.name, + identifier: (e.identifiers ?? [{ type: 'nist', id: e.id }]).map((i: any) => ({ + '@type': 'PropertyValue', propertyID: i.type, value: i.id, + })), + } + + if (key === 'units') { + if (e.symbols?.unicode) o.symbol = e.symbols.unicode + o.rootUnit = e.root + if (e.scale) o.scaleReference = { '@id': `${BASE}/scale/${e.scale.id}` } + if (e.systems?.length) o.unitSystemReference = e.systems.map((s: any) => ({ '@id': `${BASE}/unit-system/${s.id}`, name: s.name })) + if (e.quantities?.length) o.quantityReference = e.quantities.map((q: any) => ({ '@id': `${BASE}/quantity/${q.id}`, name: q.name })) + if (e.dimension) o.dimensionReference = { '@id': `${BASE}/dimension/${e.dimension.id}`, expression: e.dimension.expression } + if (e.root_units?.length) { + o.rootUnits = e.root_units.map((ru: any) => { + const entry: any = { + power: ru.power, + unitReference: { '@id': `${BASE}/unit/${ru.unit.id}`, name: ru.unit.name, symbol: ru.unit.symbol }, + } + if (ru.prefix) { + entry.prefixReference = { '@id': `${BASE}/prefix/${ru.prefix.id}`, name: ru.prefix.name, symbol: ru.prefix.symbol } + } + return entry + }) + } + } else if (key === 'quantities') { + o.quantityType = e.type + if (e.dimension) o.dimensionReference = { '@id': `${BASE}/dimension/${e.dimension.id}`, expression: e.dimension.expression } + if (e.units?.length) o.measuredBy = e.units.map((u: any) => ({ '@id': `${BASE}/unit/${u.id}`, name: u.name })) + } else if (key === 'dimensions') { + o.expression = e.expression + if (e.components?.length) o.dimensionalComposition = e.components.map((c: any) => ({ key: c.key, symbol: c.symbol, power: c.power })) + if (e.dimensionless) o.dimensionless = true + } else if (key === 'prefixes') { + o.symbol = e.symbol; o.base = e.base; o.power = e.power; o.value = e.value + } else if (key === 'scales') { + o.properties = e.properties + } else if (key === 'unit_systems') { + o.short = e.short + } + return o + } + + const collections: Record = { + units: unitsOut, quantities: quantitiesOut, dimensions: dimensionsOut, + prefixes: prefixesOut, scales: scalesOut, unit_systems: systemsOut, + } + + // Per-type JSON-LD + for (const [key, items] of Object.entries(collections)) { + const seg = pathSeg[key] + const filename = key === 'unit_systems' ? 'unit-systems.jsonld' : `${seg}.jsonld` + const graph = items.map(e => toLd(key, e)) + writeJson(filename, { '@context': CTX, '@graph': graph }) + } + + // Complete dataset + const fullGraph: any[] = [] + for (const [key, items] of Object.entries(collections)) { + for (const e of items) fullGraph.push(toLd(key, e)) + } + writeJson('unitsdb.jsonld', { '@context': CTX, '@graph': fullGraph }) + console.log(`unitsdb.jsonld: ${fullGraph.length} entities`) + + // ── Helper ── + function writeJson(filename: string, data: any) { + const fp = path.join(OUT_PATH, filename) + fs.writeFileSync(fp, JSON.stringify(data, null, 2), 'utf-8') + const size = fs.statSync(fp).size + console.log(`${filename}: ${(size / 1024).toFixed(1)} KB`) + } +} + +main() diff --git a/software/index.md b/software/index.md new file mode 100644 index 0000000..5edeb27 --- /dev/null +++ b/software/index.md @@ -0,0 +1,40 @@ +--- +title: Software +description: Software libraries for working with UnitsML +--- + +# Software + +Libraries and tools for working with UnitsML and UnitsDB programmatically. + +## How the pieces fit together + + + + + +## Libraries + +
+
+
{{ project.icon }}
+

+ {{ project.name }} + {{ project.version }} +

+

{{ project.description }}

+
+ GitHub + Docs +
+
+
+ +## Related resources + +- [UnitsDB](/unitsdb/) β€” browse the complete database with 716 entities +- [Schemas](/schemas) β€” UnitsML XML Schemas and UnitsDB YAML Schemas +- [unitsdb-ruby](/software/unitsdb-ruby) β€” Ruby library for accessing UnitsDB data +- [unitsml-ruby](/software/unitsml-ruby) β€” Ruby library for working with UnitsML expressions diff --git a/software/schemas.md b/software/schemas.md new file mode 100644 index 0000000..d1e557b --- /dev/null +++ b/software/schemas.md @@ -0,0 +1,12 @@ +--- +title: Schemas +description: Schema definitions for UnitsML and UnitsDB +--- + + + +Redirecting to [Schemas](/schemas)... diff --git a/software/unitsdb-ruby.md b/software/unitsdb-ruby.md new file mode 100644 index 0000000..77790f7 --- /dev/null +++ b/software/unitsdb-ruby.md @@ -0,0 +1,92 @@ +--- +title: unitsdb-ruby +description: Ruby library for accessing and manipulating UnitsDB content +--- + +# unitsdb-ruby + +
+ + + View on GitHub + +
+ +A Ruby library for accessing and manipulating UnitsDB content. The gem ships with UnitsDB YAML data files bundled internally β€” no separate data source configuration needed. + +## Installation + +```bash +gem install unitsdb +``` + +## Usage + +```ruby +require 'unitsdb' + +# Access the bundled database +db = Unitsdb.database + +# Query units +unit = db.units.find { |u| u.name == "metre" } +puts unit.id # => "NISTu1" +puts unit.symbols # => "m" + +# Query quantities +length = db.quantities.find { |q| q.name == "length" } + +# Browse unit systems, dimensions, prefixes, and scales +db.unit_systems.each { |sys| puts sys.name } +``` + +## Features + +
+
+
+ +
+

Bundled Data

+

UnitsDB YAML data files are included in the gem. No external configuration or data download required.

+
+
+
+ +
+

Full Database API

+

Programmatic access to all 716 entities β€” units, quantities, dimensions, prefixes, scales, and unit systems.

+
+
+
+ +
+

Validated Data

+

YAML schema validation ensures data integrity. The gem and data versions are managed independently.

+
+
+ + diff --git a/software/unitsdb.md b/software/unitsdb.md new file mode 100644 index 0000000..5a3ea2f --- /dev/null +++ b/software/unitsdb.md @@ -0,0 +1,12 @@ +--- +title: UnitsDB +description: Database of scientific units of measure +--- + + + +Redirecting to [UnitsDB](/unitsdb/)... diff --git a/software/unitsml-ruby.md b/software/unitsml-ruby.md new file mode 100644 index 0000000..33df433 --- /dev/null +++ b/software/unitsml-ruby.md @@ -0,0 +1,87 @@ +--- +title: unitsml-ruby +description: Library to work with UnitsML in Ruby +--- + +# unitsml-ruby + +
+ + + View on GitHub + +
+ +Library to work with UnitsML in Ruby β€” parse unit strings, generate MathML representations, and perform dimensional analysis. + +## Installation + +```bash +gem install unitsml +``` + +## Usage + +```ruby +require 'unitsml' + +# Parse a unit expression +unit = Unitsml::Unit.parse("m/s^2") + +# Generate MathML +mathml = unit.to_mathml + +# Access dimensional information +dimension = unit.dimension +``` + +## Features + +
+
+
+ +
+

Unit Parsing

+

Parse UnitsML unit expressions into structured Ruby objects with full dimensional analysis.

+
+
+
+ +
+

MathML Generation

+

Generate MathML markup for unit symbols and expressions, ready for scientific document rendering.

+
+
+
+ +
+

UnitsDB Integration

+

Built on top of UnitsDB data for accurate unit definitions, symbols, and dimensional relationships.

+
+
+ + diff --git a/specs/guidelines.md b/specs/guidelines.md new file mode 100644 index 0000000..53b3b90 --- /dev/null +++ b/specs/guidelines.md @@ -0,0 +1,12 @@ +--- +title: Guidelines +description: UnitsML guidelines and deliverables +--- + + + +Redirecting to [UnitsML Guide](/learn/guide)... diff --git a/title.html b/title.html deleted file mode 100644 index 7e0bac7..0000000 --- a/title.html +++ /dev/null @@ -1 +0,0 @@ -{% svg assets/logo-text.svg title="UnitsML" %} diff --git a/tos.md b/tos.md new file mode 100644 index 0000000..bbac8e5 --- /dev/null +++ b/tos.md @@ -0,0 +1,3 @@ +# Terms of Service + +To be provided. diff --git a/tsconfig.json b/tsconfig.json new file mode 100644 index 0000000..089c001 --- /dev/null +++ b/tsconfig.json @@ -0,0 +1,15 @@ +{ + "compilerOptions": { + "target": "ES2022", + "module": "ESNext", + "moduleResolution": "bundler", + "strict": true, + "esModuleInterop": true, + "skipLibCheck": true, + "forceConsistentCasingInFileNames": true, + "resolveJsonModule": true, + "isolatedModules": true, + "jsx": "preserve" + }, + "include": [".vitepress/**/*.ts", ".vitepress/**/*.vue"] +} diff --git a/unitsdb/[type]/[id].md b/unitsdb/[type]/[id].md new file mode 100644 index 0000000..b7df660 --- /dev/null +++ b/unitsdb/[type]/[id].md @@ -0,0 +1,7 @@ +--- +title: Entity Detail +layout: page +pageClass: unitsdb-full +--- + + diff --git a/unitsdb/[type]/[id].paths.ts b/unitsdb/[type]/[id].paths.ts new file mode 100644 index 0000000..31f898b --- /dev/null +++ b/unitsdb/[type]/[id].paths.ts @@ -0,0 +1,39 @@ +import { readFileSync } from 'node:fs' +import { resolve, dirname } from 'node:path' +import { fileURLToPath } from 'node:url' + +const __dirname = dirname(fileURLToPath(import.meta.url)) + +const TYPE_FILE: Record = { + units: 'units', + quantities: 'quantities', + dimensions: 'dimensions', + prefixes: 'prefixes', + scales: 'scales', + systems: 'unit_systems', +} + +function slugify(uid: string): string { + return uid.replace(/[^a-zA-Z0-9._-]/g, '_') +} + +export default { + watch: ['../../public/unitsdb/*.json'], + + paths() { + const root = resolve(__dirname, '..', '..') + const result: { params: { type: string; id: string } }[] = [] + + for (const [urlType, fileKey] of Object.entries(TYPE_FILE)) { + const raw = readFileSync(resolve(root, `public/unitsdb/${fileKey}.json`), 'utf-8') + const items: any[] = JSON.parse(raw) + for (const item of items) { + result.push({ + params: { type: urlType, id: slugify(item.unitsml_id) } + }) + } + } + + return result + } +} diff --git a/unitsdb/dimensions.md b/unitsdb/dimensions.md new file mode 100644 index 0000000..dccfc39 --- /dev/null +++ b/unitsdb/dimensions.md @@ -0,0 +1,25 @@ +--- +title: UnitsDB +description: Interactive database of scientific units of measure +layout: page +pageClass: unitsdb-full +--- + +
+
+ +
+
+ + diff --git a/unitsdb/index.md b/unitsdb/index.md new file mode 100644 index 0000000..dccfc39 --- /dev/null +++ b/unitsdb/index.md @@ -0,0 +1,25 @@ +--- +title: UnitsDB +description: Interactive database of scientific units of measure +layout: page +pageClass: unitsdb-full +--- + +
+
+ +
+
+ + diff --git a/unitsdb/prefixes.md b/unitsdb/prefixes.md new file mode 100644 index 0000000..dccfc39 --- /dev/null +++ b/unitsdb/prefixes.md @@ -0,0 +1,25 @@ +--- +title: UnitsDB +description: Interactive database of scientific units of measure +layout: page +pageClass: unitsdb-full +--- + +
+
+ +
+
+ + diff --git a/unitsdb/quantities.md b/unitsdb/quantities.md new file mode 100644 index 0000000..dccfc39 --- /dev/null +++ b/unitsdb/quantities.md @@ -0,0 +1,25 @@ +--- +title: UnitsDB +description: Interactive database of scientific units of measure +layout: page +pageClass: unitsdb-full +--- + +
+
+ +
+
+ + diff --git a/unitsdb/scales.md b/unitsdb/scales.md new file mode 100644 index 0000000..dccfc39 --- /dev/null +++ b/unitsdb/scales.md @@ -0,0 +1,25 @@ +--- +title: UnitsDB +description: Interactive database of scientific units of measure +layout: page +pageClass: unitsdb-full +--- + +
+
+ +
+
+ + diff --git a/unitsdb/systems.md b/unitsdb/systems.md new file mode 100644 index 0000000..dccfc39 --- /dev/null +++ b/unitsdb/systems.md @@ -0,0 +1,25 @@ +--- +title: UnitsDB +description: Interactive database of scientific units of measure +layout: page +pageClass: unitsdb-full +--- + +
+
+ +
+
+ + diff --git a/unitsdb/units.md b/unitsdb/units.md new file mode 100644 index 0000000..dccfc39 --- /dev/null +++ b/unitsdb/units.md @@ -0,0 +1,25 @@ +--- +title: UnitsDB +description: Interactive database of scientific units of measure +layout: page +pageClass: unitsdb-full +--- + +
+
+ +
+
+ +