{"draft":"draft-ietf-sip-rfc3312-update-03","doc_id":"RFC4032","title":" Update to the Session Initiation Protocol (SIP) Preconditions Framework ","authors":["G. Camarillo","P. Kyzivat"],"format":["ASCII","HTML"],"page_count":"10","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Session Initiation Protocol","abstract":" This document updates RFC 3312, which defines the framework for preconditions in SIP.  We provide guidelines for authors of new precondition types and describe how to use SIP preconditions in situations that involve session mobility.  [STANDARDS-TRACK]","pub_date":"February 2005","keywords":["qos","quality of service","precondition"],"obsoletes":[],"obsoleted_by":[],"updates":["RFC3312"],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC4032","errata_url":null}