3.1.4.6.3.5 ServerSyncUrlData

 <s:complexType name="ServerSyncUrlData">
   <s:sequence>
     <s:element minOccurs="0" maxOccurs="1" name="FileDigest" 
     type="s:base64Binary" />
     <s:element minOccurs="0" maxOccurs="1" name="MUUrl" 
     type="s:string" />
     <s:element minOccurs="0" maxOccurs="1" name="UssUrl" 
     type="s:string" />
   </s:sequence>
 </s:complexType>

FileDigest: An SHA-1 hash of the content file.

MUUrl: An HTTP URL specifying the location on the Internet from which client computers can download this file. This field MUST NOT be present if no such location is available.<38>

UssUrl: Unused. This field SHOULD NOT be present, and MUST be ignored on receipt.<39>