2.2.3.2 GET
A client can use the GET method, as specified in [RFC2518], to fetch the contents of an existing WebDAVresource. In the context of the WebDAV Extensions for Replication, the GET method is used to download the content change for a particular WebDAV resource.
Every WebDAV server MUST return the updated resourcetag XML element, as specified in section 2.2.2.6, of the affected WebDAV resource in the response headers.