From 6064ca05e5deaefe9b7e4af9ddcf23a30eb29d8b Mon Sep 17 00:00:00 2001
From: Jeff Klassen <jklassen@biblesocieties.org>
Date: Fri, 14 Dec 2018 16:26:54 -0500
Subject: [PATCH] Update figure attributes (ref is required)

---
 schema/usx.rnc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/schema/usx.rnc b/schema/usx.rnc
index dd24549..dc8d07d 100644
--- a/schema/usx.rnc
+++ b/schema/usx.rnc
@@ -775,7 +775,7 @@ Figure =
         attribute size { text },
         attribute loc { text }?,
         attribute copy { text }?,
-        attribute ref { text }?,
+        attribute ref { text },
         text? # Caption
     }