[Standards] XEP-0237 (Roster Versioning): when to include the 'ver' attribute

Peter Saint-Andre stpeter at stpeter.im
Thu Feb 11 23:08:42 UTC 2010

There has been some confusion about when a client shall include the
'ver' attribute, discussed earlier today in the jdev chatroom. As a
result, I have provisionally updated the spec to read:


If a client supports roster versioning and the server to which it has
connected advertises support for roster versioning as described under
Stream Feature, then the client MUST include the 'ver' element in its
request for the roster. If the server does not advertise support for
roster versioning, the client MUST NOT include the 'ver' attribute.


Version 1.1rc1 is here:


You can view a diff here:



Peter Saint-Andre

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