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Changes
Instance ID param has to be a URN
Equality rules for URN are scheme specific if scheme understood, else lexical
Will not be an issue
Introduction motivates the draft
Question was: doesn’t RFC3261 already require GRUU property in Contact?
GRUU property of long-livedness is back
Was there before, but too weak
GRUUs resolved using rfc3263
New UML Model and updated behavior sections to be clearer
PPT Version