From bae4a0e743677e6c2593c2c9948aa2346cdc97ea Mon Sep 17 00:00:00 2001
From: BenBeattieHood <benb@pageuppeople.com>
Date: Mon, 7 May 2018 11:14:26 +1000
Subject: [PATCH] Add event 'ordinal' field

Signed-off-by: BenBeattieHood <benb@pageuppeople.com>
---
 spec.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/spec.md b/spec.md
index 6c98f4522..435206e22 100644
--- a/spec.md
+++ b/spec.md
@@ -318,6 +318,14 @@ that contains both context and data).
 * Constraints:
   * REQUIRED
   * MUST be a non-empty string
+  
+### ordinal
+* Type: `String`
+* Description: Value expressing the relative order of the event. This enables
+  interpretation of data supercedence.
+* Constraints:
+  * REQUIRED
+  * MUST be a non-empty lexicographically-orderable string
 
 ### source
 * Type: `URI`