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WS-Eventing Section 4.1: [Body]/wse:SubscribeResponse/wse:GrantedExpires The expiration time assigned by the event source. The expiration time MAY be either an absolute time or a duration but SHOULD be of the same type as the requested expiration (if any). WS-Enumeration Section 3.1: [Body]/wsen:EnumerateResponse/wsen:GrantedExpires The expiration time assigned by the data source. The expiration time MAY be either an absolute time or a duration but SHOULD be of the same type as the requested expiration (if any). In both cases, the specs allow the server to return an expiration time that has different type as requested by the client. For example, the server returns an absolute time for a requested duration. This can create problems for clients that only support the requested expiration type. Proposal: change "SHOULD" in the above statements to "MUST" in both specs.
resolved with http://lists.w3.org/Archives/Public/public-ws-resource-access/2009Oct/0044.html