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  === Proposal for supporting WS-MetadataExchange on Axis2 ===
  
- Metadata Exchange is an implementation to support WS-MetadataExchange 
specification published by IBM, Microsoft, BEA Systems, SAP, and Sun 
Microsystems. The WS-MetadataExchange specification essentially allows for a 
service requester to issue a standardized request message that ask for some or 
all of the metadata documents such as WSDL, XSD schema, policy associated with 
a Web service. The request to issue is a Get Metadata request message. This 
kicks off a standardized request and response MEP resulting in the delivery of 
a Get Metadata Response message.
+ Metadata Exchange is an implementation to support 
[http://schemas.xmlsoap.org/ws/2004/09/mex/ WS-MetadataExchange specification] 
published by IBM, Microsoft, BEA Systems, SAP, and Sun Microsystems. The 
specification essentially allows for a service requester to issue a 
standardized request message that ask for some or all of the metadata documents 
such as WSDL, XSD schema, policy associated with a Web service. The request to 
issue is a Get Metadata request message. This kicks off a standardized request 
and response MEP resulting in the delivery of a Get Metadata Response message.
  
  To support incoming Get Metadata request message from SOAP protocol engines, 
Axis2 SOAP processing is extended with new metadataExchange module, and allows 
plug-in of Data Locators. Data Locator is responsible to perform data 
retrieval. The plug-in support allows other Web Services engines that build on 
top of Axis2 to support different data retrieval implementation. 
  

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