Technical Summary
This specification defines a new SIP header field, Feature-Caps, to
convey feature capability indicators, which are used by SIP entities
not represented by the URI of the Contact header field to indicate
support of features and capabilities, where media feature tags cannot
be used to indicate the support.
This specification also defines feature capability indicators, and
creates a new IANA registry, "Proxy-Feature Feature Capability
Indicator Trees", for registering feature capability indicators.
Working Group Summary
This document was driven by, and appears to be of interest
primarily to the IMS community. However the resulting mechanism
is of general applicability.
Document Quality
There are implementations of this document.
3GPP IMS has a dependency on this document. It will be
incorporated by reference in an upcoming version of IMS,
and will thus eventually be implemented widely.
The document shepherd has been a reviewer and critic
of this document, and promoted significant changes in
the contemplated mechanism.
Shida Shubert provided an in depth WGLC review.
Personnel
Paul Kyzivat is the document shepherd. Robert Sparks is the responsible area director.