diff --git a/xep-0272.xml b/xep-0272.xml
index b3c5c4147..47555f56d 100644
--- a/xep-0272.xml
+++ b/xep-0272.xml
@@ -38,6 +38,17 @@
     <jid>dafydd.harries@collabora.co.uk</jid>
   </author>
   &larma;
+  <revision>
+    <version>0.2.1</version>
+    <date>2025-05-03</date>
+    <initials>lnj</initials>
+    <remark>
+      <ul>
+        <li>Add 'urn:xmpp:jingle:1' namespace to &lt;content&gt; elements in examples</li>
+        <li>Add XML schema</li>
+      </ul>
+    </remark>
+  </revision>
   <revision>
     <version>0.2.0</version>
     <date>2024-08-21</date>
@@ -142,7 +153,7 @@
     ver="48QdBuXRCJFb8qIzgy1FOHSGO0U="
     hash="sha-1" />
   <muji xmlns='urn:xmpp:jingle:muji:0'>
-    <content creator='initiator' name='video'>
+    <content xmlns='urn:xmpp:jingle:1' creator='initiator' name='video'>
       <description xmlns='urn:xmpp:jingle:apps:rtp:0' media='video'>
         <payload-type id='97' name='theora' clockrate='90000'/>
       </description>
@@ -197,7 +208,7 @@
           initiator='hag66@shakespeare.lit/mobile'
           sid='sid1'>
     <muji room='darkcave@chat.shakespeare.lit' xmlns='urn:xmpp:jingle:muji:0' />
-    <content creator='initiator' name='this-is-a-stub'>
+    <content xmlns='urn:xmpp:jingle:1' creator='initiator' name='this-is-a-stub'>
       <description xmlns='urn:xmpp:jingle:apps:stub:0'/>
       <transport xmlns='urn:xmpp:jingle:transports:stub:0'/>
     </content>
@@ -231,7 +242,7 @@
         ver="48QdBuXRCJFb8qIzgy1FOHSGO0U="
         hash="sha-1" />
       <muji xmlns='urn:xmpp:jingle:muji:0'>
-        <content creator='initiator' name='voice'>
+        <content xmlns='urn:xmpp:jingle:1' creator='initiator' name='voice'>
           <description xmlns='urn:xmpp:jingle:apps:rtp:0' media='audio'>
             <payload-type id='97' name='speex' clockrate='8000'/>
             <payload-type id='18' name='G729'/>
@@ -262,12 +273,12 @@
         ver="48QdBuXRCJFb8qIzgy1FOHSGO0U="
         hash="sha-1" />
       <muji xmlns='urn:xmpp:jingle:muji:0'>
-        <content creator='initiator' name='video'>
+        <content xmlns='urn:xmpp:jingle:1' creator='initiator' name='video'>
           <description xmlns='urn:xmpp:jingle:apps:rtp:0' media='video'>
             <payload-type id='97' name='theora' clockrate='90000'/>
           </description>
         </content>
-        <content creator='initiator' name='voice'>
+        <content xmlns='urn:xmpp:jingle:1' creator='initiator' name='voice'>
           <description xmlns='urn:xmpp:jingle:apps:rtp:0' media='audio'>
             <payload-type id='97' name='speex' clockrate='8000'/>
             <payload-type id='18' name='G729'/>
@@ -322,4 +333,37 @@
   </invite>
 </message>>]]></example>
 </section1>
+
+<section1 topic='XML Schema'>
+  <code><![CDATA[
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema
+    xmlns:xs="http://www.w3.org/2001/XMLSchema"
+    targetNamespace="urn:xmpp:jingle:muji:0"
+    xmlns:muji="urn:xmpp:jingle:muji:0"
+    xmlns:jingle='urn:xmpp:jingle:1'
+    elementFormDefault="qualified">
+
+  <!-- Root element: <muji> -->
+  <xs:element name="muji" type="muji:MujiType"/>
+
+  <!-- Type for <muji> -->
+  <xs:complexType name="MujiType">
+    <xs:sequence>
+      <xs:element ref="muji:preparing" minOccurs="0" maxOccurs="1"/>
+      <xs:element ref="jingle:content" minOccurs="0" maxOccurs="unbounded"/>
+    </xs:sequence>
+    <xs:attribute name="room" type="xs:string" use="optional"/>
+  </xs:complexType>
+
+  <xs:element name="preparing" type="muji:EmptyElementType"/>
+
+  <!-- strictly empty type (no children, attributes, or text) -->
+  <xs:complexType name="EmptyElementType" mixed="false">
+    <xs:sequence/>
+  </xs:complexType>
+
+</xs:schema>
+  ]]></code>
+</section1>
 </xep>