{
  "draft": "draft-ietf-cuss-sip-uui-17",
  "doc_id": "RFC7433",
  "title": "A Mechanism for Transporting User-to-User Call Control Information in SIP",
  "authors": [
    "A. Johnston",
    "J. Rafferty"
  ],
  "format": [
    "TEXT",
    "HTML"
  ],
  "page_count": "19",
  "pub_status": "PROPOSED STANDARD",
  "status": "PROPOSED STANDARD",
  "source": "Call Control UUI Service for SIP",
  "abstract": "There is a class of applications that benefit from using SIP to exchange User-to-User Information (UUI) data during session establishment.  This information, known as call control UUI data, is a small piece of data inserted by an application initiating the session and utilized by an application accepting the session.  The syntax and semantics for the UUI data used by a specific application are defined by a UUI package.  This UUI data is opaque to SIP and its function is unrelated to any basic SIP function.  This document defines a new SIP header field, User-to-User, to transport UUI data, along with an extension mechanism.",
  "pub_date": "January 2015",
  "keywords": [
    "UUI",
    "Package",
    "Content",
    "Encoding",
    "Media"
  ],
  "obsoletes": [],
  "obsoleted_by": [],
  "updates": [],
  "updated_by": [],
  "see_also": [],
  "doi": "10.17487/RFC7433",
  "errata_url": null
}