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diff --git a/schema/MetadataExchange.xsd b/schema/MetadataExchange.xsd
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+<?xml version='1.0' encoding='UTF-8' ?>
+<!--
+(c) 2004-2006 BEA Systems Inc., Computer Associates International, Inc.,
+International Business Machines Corporation, Microsoft Corporation,
+Inc., SAP AG, Sun Microsystems, and webMethods. All rights reserved. 
+
+Permission to copy and display the WS-MetadataExchange Specification
+(the "Specification"), in any medium without fee or royalty is hereby
+granted, provided that you include the following on ALL copies of the
+Specification that you make:
+
+1.	A link or URL to the Specification at this location.
+2.	The copyright notice as shown in the Specification.
+
+BEA Systems, Computer Associates, IBM, Microsoft, SAP, Sun, and
+webMethods (collectively, the "Authors") each agree to grant you a
+license, under royalty-free and otherwise reasonable,
+non-discriminatory terms and conditions, to their respective essential
+patent claims that they deem necessary to implement the
+WS-MetadataExchange Specification.
+
+THE SPECIFICATION IS PROVIDED "AS IS," AND THE AUTHORS MAKE NO
+REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT
+LIMITED TO, WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+PURPOSE, NON-INFRINGEMENT, OR TITLE; THAT THE CONTENTS OF THE
+SPECIFICATION ARE SUITABLE FOR ANY PURPOSE; NOR THAT THE
+IMPLEMENTATION OF SUCH CONTENTS WILL NOT INFRINGE ANY THIRD PARTY
+PATENTS, COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS.
+
+THE AUTHORS WILL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL,
+INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF OR RELATING TO ANY
+USE OR DISTRIBUTION OF THE SPECIFICATIONS.
+
+The name and trademarks of the Authors may NOT be used in any manner,
+including advertising or publicity pertaining to the Specifications or
+their contents without specific, written prior permission. Title to
+copyright in the Specifications will at all times remain with the
+Authors.
+
+No other rights are granted by implication, estoppel or otherwise.
+-->
+
+<xs:schema
+    targetNamespace='http://schemas.xmlsoap.org/ws/2004/09/mex'
+    xmlns:tns='http://schemas.xmlsoap.org/ws/2004/09/mex'
+    xmlns:wsa10='http://www.w3.org/2005/08/addressing'
+    xmlns:wsa04='http://schemas.xmlsoap.org/ws/2004/08/addressing'
+    xmlns:xs='http://www.w3.org/2001/XMLSchema'
+    elementFormDefault='qualified'
+    blockDefault='#all' >
+
+  <!-- Get Metadata request -->
+  <xs:element name='GetMetadata' >
+    <xs:complexType>
+      <xs:sequence>
+        <xs:element ref='tns:Dialect' minOccurs='0' />
+        <xs:element ref='tns:Identifier' minOccurs='0' />
+      </xs:sequence>
+      <xs:anyAttribute namespace='##other' processContents='lax' />
+    </xs:complexType>
+  </xs:element>
+
+  <xs:element name='Dialect' type='xs:anyURI' />
+  <xs:element name='Identifier' type='xs:anyURI' />
+
+  <!-- Get Metadata response -->
+  <xs:element name='Metadata' >
+    <xs:complexType>
+      <xs:sequence>
+        <xs:element ref='tns:MetadataSection'
+                    minOccurs='0'
+                    maxOccurs='unbounded' />
+        <xs:any namespace='##other' processContents='lax'
+                minOccurs='0'
+                maxOccurs='unbounded' />
+      </xs:sequence>
+      <xs:anyAttribute namespace='##other' processContents='lax' />
+    </xs:complexType>
+  </xs:element>
+
+  <xs:element name='MetadataSection' >
+    <xs:complexType>
+      <xs:choice>
+        <xs:any namespace='##other' processContents='lax' />
+        <xs:element ref='tns:MetadataReference' />
+        <xs:element ref='tns:Location' />
+      </xs:choice>
+      <xs:attribute name='Dialect' type='xs:anyURI' use='required' />
+      <xs:attribute name='Identifier' type='xs:anyURI' />
+      <xs:anyAttribute namespace='##other' processContents='lax' />
+    </xs:complexType>
+  </xs:element>
+  
+  <!-- 
+       Ideally, the type of the MetadataReference would have been
+       the union of wsa04:EndpointReferenceType and
+       wsa10:EndpointReferenceType but unfortunately xs:union only
+       works for simple types. As a result, we have to define
+       the mex:MetadataReference using xs:any.
+  -->
+
+  <xs:element name='MetadataReference'>
+    <xs:complexType>
+      <xs:sequence>
+        <xs:any minOccurs='1' maxOccurs='unbounded' 
+                processContents='lax' namespace='##other' />
+      </xs:sequence>
+    </xs:complexType>
+  </xs:element>
+  <xs:element name='Location'
+              type='xs:anyURI' />
+</xs:schema>