{
  "draft": "draft-iab-use-it-or-lose-it-04",
  "doc_id": "RFC9170",
  "title": "Long-Term Viability of Protocol Extension Mechanisms",
  "authors": [
    "M. Thomson",
    "T. Pauly"
  ],
  "format": [
    "XML",
    "TEXT",
    "HTML",
    "PDF"
  ],
  "page_count": "17",
  "pub_status": "INFORMATIONAL",
  "status": "INFORMATIONAL",
  "source": "IAB",
  "abstract": "The ability to change protocols depends on exercising the extension and version-negotiation mechanisms that support change.  This document explores how regular use of new protocol features can ensure that it remains possible to deploy changes to a protocol.  Examples are given where lack of use caused changes to be more difficult or costly.",
  "pub_date": "December 2021",
  "keywords": [
    "Extensions",
    "versions",
    "grease"
  ],
  "obsoletes": [],
  "obsoleted_by": [],
  "updates": [],
  "updated_by": [],
  "see_also": [],
  "doi": "10.17487/RFC9170",
  "errata_url": null
}