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Session Info vs. Session Policy Two usages of this format with a different semantic: Session info documents Describe properties of a session (e.g. media streams, Request-URI). Used for session-specific policies. UA submits session info document in SUBSCRIBE. Policy server returns a policy compliant version of this document in NOTIFY. Session policy documents Encode a policy that can be applied to different sessions (e.g. no video) Used for session-independent policies. Policy server returns policy document in NOTIFY. XML format Different root elements for the two document types. Same XML elements to encode session properties (e.g. media types, codecs). |