From 4980b025bd84af6f0254db93a982a67ca23fc79e Mon Sep 17 00:00:00 2001
From: Stefan Behnel <stefan_ml@behnel.de>
Date: Fri, 23 Nov 2018 20:57:12 +0100
Subject: Make <properties> tag in ISO-Schematron RNG optional, diverging from
 the 2016 version of the standard.

---
 src/lxml/isoschematron/resources/rng/iso-schematron.rng | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/lxml/isoschematron/resources/rng/iso-schematron.rng b/src/lxml/isoschematron/resources/rng/iso-schematron.rng
index dcb08038..a4f504af 100644
--- a/src/lxml/isoschematron/resources/rng/iso-schematron.rng
+++ b/src/lxml/isoschematron/resources/rng/iso-schematron.rng
@@ -83,7 +83,10 @@
           <optional>
             <ref name="diagnostics"/>
           </optional>
-          <ref name="properties"/>
+          <optional>
+            <!-- edited (lxml): required in standard, optional here (since it can be empty anyway) -->
+            <ref name="properties"/>
+          </optional>
         </group>
       </interleave>
     </element>
-- 
cgit v1.2.1