diff --git a/src/metadata/index.js b/src/metadata/index.js
index 974922c..aa5106d 100644
--- a/src/metadata/index.js
+++ b/src/metadata/index.js
@@ -1,6 +1,8 @@
 export * from './constants.js';
+import isMetadata from './is-metadata.js';
 import normaliseName from './normalise-name.js';
 
 export {
+  isMetadata,
   normaliseName,
 };
diff --git a/src/metadata/is-metadata.js b/src/metadata/is-metadata.js
new file mode 100644
index 0000000..c78da10
--- /dev/null
+++ b/src/metadata/is-metadata.js
@@ -0,0 +1,12 @@
+const METADATA_START = '[';
+
+/**
+ * Checks whether a field path targets metadata (ie. starts with `[`).
+ * Attention: This does not guarantee the metadata itself exists.
+ *
+ * @param {string} path - Field path to check
+ * @returns {boolean} True when field path follows metadata format
+ */
+const isMetadata = (path) => path[0] === METADATA_START;
+
+export default isMetadata;
diff --git a/src/metadata/is-metadata.test.js b/src/metadata/is-metadata.test.js
new file mode 100644
index 0000000..f3c8e36
--- /dev/null
+++ b/src/metadata/is-metadata.test.js
@@ -0,0 +1,57 @@
+import isMetadata from './is-metadata.js';
+
+test.each([
+  // Current
+  '[workspace]',
+  '[type]',
+  '[id]',
+  '[title]',
+  '[state]',
+  '[classification]',
+  '[createdAt]',
+  '[lastModifiedAt]',
+
+  // Legacy
+  '[organisation]',
+  '[jurisdiction]',
+  '[case_type]',
+  '[reference]',
+  '[case_reference]',
+  '[security_classification]',
+  '[created]',
+  '[created_date]',
+  '[modified]',
+  '[last_modified]',
+  '[last_modified_date]',
+])('should be recognised as metadata when name between brackets: %s', (actual) => {
+  expect(isMetadata(actual)).toBeTruthy();
+});
+
+test.each([
+  'workspace',
+  'type',
+  'id',
+  'title',
+  'state',
+  'classification',
+  'createdAt',
+  'lastModifiedAt',
+  'organisation',
+  'jurisdiction',
+  'case_type',
+  'reference',
+  'case_reference',
+  'security_classification',
+  'created',
+  'created_date',
+  'modified',
+  'last_modified',
+  'last_modified_date',
+  'randomField',
+  'randomPath.to.field',
+  'collection[123]',
+  'collection[id:item-1]',
+  'collection[123].value.member',
+])('should not be recognised as metadata when name not between brackets: %s', (actual) => {
+  expect(isMetadata(actual)).toBeFalsy();
+});
diff --git a/src/metadata/normalise-name.js b/src/metadata/normalise-name.js
index af37704..3c56334 100644
--- a/src/metadata/normalise-name.js
+++ b/src/metadata/normalise-name.js
@@ -29,10 +29,13 @@ const normaliseName = (metadataName) => {
     case 'security_classification': // Legacy
       return NAMES.CLASSIFICATION;
     case 'createdat':
+    case 'created': // Legacy
     case 'created_date': // Legacy
       return NAMES.CREATED_AT;
     case 'lastmodifiedat':
+    case 'modified': // Legacy
     case 'last_modified': // Legacy
+    case 'last_modified_date': // Legacy
       return NAMES.LAST_MODIFIED_AT;
     default:
       return;
diff --git a/src/metadata/normalise-name.test.js b/src/metadata/normalise-name.test.js
index ccf0189..4eb42a0 100644
--- a/src/metadata/normalise-name.test.js
+++ b/src/metadata/normalise-name.test.js
@@ -87,6 +87,7 @@ describe('createdAt', () => {
   test.each([
     ['identity', NAMES.CREATED_AT, NAMES.CREATED_AT],
     ['case insensitive', '[CREATEDat]', NAMES.CREATED_AT],
+    ['legacy', '[created]', NAMES.CREATED_AT],
     ['legacy', '[created_date]', NAMES.CREATED_AT],
     ['no brackets', 'createdAt', NAMES.CREATED_AT],
     ['no brackets + case insensitive', 'CREATEDat', NAMES.CREATED_AT],
@@ -100,7 +101,9 @@ describe('lastModifiedAt', () => {
   test.each([
     ['identity', NAMES.LAST_MODIFIED_AT, NAMES.LAST_MODIFIED_AT],
     ['case insensitive', '[lastMODIFIEDat]', NAMES.LAST_MODIFIED_AT],
+    ['legacy', '[modified]', NAMES.LAST_MODIFIED_AT],
     ['legacy', '[last_modified]', NAMES.LAST_MODIFIED_AT],
+    ['legacy', '[last_modified_date]', NAMES.LAST_MODIFIED_AT],
     ['no brackets', 'lastModifiedAt', NAMES.LAST_MODIFIED_AT],
     ['no brackets + case insensitive', 'lastMODIFIEDat', NAMES.LAST_MODIFIED_AT],
     ['no brackets + legacy', 'last_modified', NAMES.LAST_MODIFIED_AT],
diff --git a/src/record/extract-value.js b/src/record/extract-value.js
index 4710b80..9b52d35 100644
--- a/src/record/extract-value.js
+++ b/src/record/extract-value.js
@@ -1,7 +1,7 @@
+import {isMetadata} from '../metadata/index.js';
 import * as Metadata from '../metadata/index.js';
 import comboExtractor from '../path/combo-extractor.js';
 
-const METADATA_START = '[';
 const COLLECTION_ITEM_PATTERN = /^(?<name>[^[\]]+)(?:\[(?:(?<colIndex>\d+)|id:(?<colId>[^[\]]+))\])?$/;
 
 /**
@@ -17,7 +17,7 @@ const COLLECTION_ITEM_PATTERN = /^(?<name>[^[\]]+)(?:\[(?:(?<colIndex>\d+)|id:(?
 const extractValue = (record) => comboExtractor(valueExtractor(record))
 
 const valueExtractor = (record) => (path) => {
-  if (path[0] === METADATA_START) {
+  if (isMetadata(path)) {
     return metadataExtractor(record)(path);
   }