sip notification security authorization protocols event package interoperability presence information authentication presence

security considerations extensibility pidf media types xml communication address content-type standards track presence information internationalization

communication presence data pidf rpid protocols xml interoperability standards track presence information

security considerations pidf standards xml timed-status presence information presence iana considerations

contact information ietf standards cipid xml presence information presence information data format

security considerations data access xml schema authorization framework location information privacy preferences standards track presence information common policy

networking user agent sip extensions capabilities pidf media types standards track presence information

security considerations email extensions sieve rfc 6133 interoperability presence information auto-responder email filtering