XEP-0402: Add schema

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>

xep-0402.xml

@@ -402,4 +402,45 @@
         <p>Security considerations related to object persistence via publish-subscribe are described in <cite>XEP-0060</cite> and <cite>XEP-0223</cite>.</p>
         <p>The client needs to make sure that the server actually supports the "http://jabber.org/protocol/pubsub#publish-options" feature, before relying on it. If it's not supported, the client should configure the '&namespace;' node first (see <cite>xep-0060</cite>), before adding any bookmarks.</p>
     </section1>
+    <section1 topic='XML Schema' anchor='schema'>
+      <code><![CDATA[
+<?xml version='1.0' encoding='UTF-8'?>
+
+<xs:schema
+    xmlns:xs='http://www.w3.org/2001/XMLSchema'
+    targetNamespace=']]>&namespace;<![CDATA['
+    xmlns=']]>&namespace;<![CDATA['
+    elementFormDefault='qualified'>
+
+  <xs:annotation>
+    <xs:documentation>
+      The protocol documented by this schema is defined in
+      XEP-0402: http://www.xmpp.org/extensions/xep-0402.html
+    </xs:documentation>
+  </xs:annotation>
+
+  <xs:element name='conference'>
+    <xs:complexType>
+      <xs:sequence>
+        <xs:element name='nick' type='xs:string' minOccurs='0'/>
+        <xs:element name='password' type='xs:string' minOccurs='0'/>
+        <xs:element ref='extensions'/>
+      </xs:sequence>
+      <xs:attribute name='autojoin' type='xs:boolean' use='optional' default='false'/>
+      <xs:attribute name='name' type='xs:string' use='optional'/>
+    </xs:complexType>
+  </xs:element>
+
+  <xs:element name='extensions'>
+    <xs:complexType>
+      <xs:sequence>
+        <xs:any namespace='##other'
+                minOccurs='0'
+                maxOccurs='unbounded'
+                processContents='lax'/>
+      </xs:sequence>
+    </xs:complexType>
+  </xs:element>
+</xs:schema>]]></code>
+    </section1>
 </xep>