Hi Qian, ext Qian Sun wrote: > Hi, > > As this draft mentioned, the presence rules may affect the views of > the resource state. If the presence rules of presentity are modified, > all of etags for this presentity have to be abandoned. Or the PS has > to evaluate whether each etag still is valid.
I'm not sure I understand what it is that should be added to the draft to clarify this issue. There are all sorts of events that drive the internal state machine of the PS, or more generally the server of any event package. For instance, authorization rules might change, the resource state might change, and those changes might or might not be visible to the subscriber. However, those details are of no concern of the subnot-etags draft, IMO. All that matters is that if the resource to which the subscriber subscribed changes, then the entity-tag changes as well. What "change" means here should be an implementation detail for every event package to figure out. IOW, I don't think it belongs in the subnot-etags draft. > For filtering, there is similar problem: > http://www1.ietf.org/mail-archive/web/sip/current/msg19724.html > > These are difference between HTTP and SIP events framework. Even HTTP resources can be dynamically generated, their access controlled using an authorization framework of considerable complexity and have many different views for different agents that access them. So I don't think HTTP resources and SIP resources are that much different in this respect. Cheers, Aki _______________________________________________ Sip mailing list https://www1.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use [EMAIL PROTECTED] for questions on current sip Use [EMAIL PROTECTED] for new developments on the application of sip
