diff --git a/client/static/xsd/cnxml.xsd b/client/static/xsd/cnxml.xsd
index 1812f6b0..80f2a42f 100644
--- a/client/static/xsd/cnxml.xsd
+++ b/client/static/xsd/cnxml.xsd
@@ -72,7 +72,7 @@
     <xs:complexType>
       <xs:all>
         <xs:element ref="mdml:content-id"/>
-        <xs:element ref="mdml:title"/>
+        <xs:element minOccurs="0" ref="mdml:title"/>
         <xs:element ref="mdml:uuid"/>
         <xs:element minOccurs="0" ref="mdml:abstract"/>
       </xs:all>
diff --git a/client/static/xsd/trang.patch b/client/static/xsd/trang.patch
index faa7d1d0..fb99ccb1 100644
--- a/client/static/xsd/trang.patch
+++ b/client/static/xsd/trang.patch
@@ -37,7 +37,7 @@ index e985975..e100413 100644
 -      </xs:choice>
 +      <xs:all>
 +        <xs:element ref="mdml:content-id"/>
-+        <xs:element ref="mdml:title"/>
++        <xs:element minOccurs="0" ref="mdml:title"/>
 +        <xs:element ref="mdml:uuid"/>
 +        <xs:element minOccurs="0" ref="mdml:abstract"/>
 +      </xs:all>