{
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  "lastModified": "2026-10-20T22:12:07.948Z",
  "sourcePath": "src/main/data/docs",
  "docId": "RFC9170",
  "document": {
    "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.",
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      "confidence": "high",
      "note": "Parsed from RFC index XML abstract",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
      "updated": "2026-10-20T21:47:24.132Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "authors": [
      {
        "name": "Martin Thomson"
      },
      {
        "name": "Tommy Pauly"
      }
    ],
    "authors$meta": {
      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
      "updated": "2026-10-20T21:47:24.132Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "docId": "RFC9170",
    "docId$meta": {
      "confidence": "high",
      "note": "Derived from RFC number or Datatracker identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
      "updated": "2026-10-20T21:47:24.132Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "docLabel": "IETF RFC 9170",
    "docLabel$meta": {
      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
      "updated": "2026-10-20T21:47:24.132Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "docNumber": "9170",
    "docNumber$meta": {
      "confidence": "high",
      "note": "From the RFC index entry (rfc-index.xml <doc-id>)",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
      "updated": "2026-10-20T21:47:24.132Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "docTitle": "Long-Term Viability of Protocol Extension Mechanisms",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
      "updated": "2026-10-20T21:47:24.132Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "docType": "Informational",
    "docType$meta": {
      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
      "updated": "2026-10-20T21:47:24.132Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "doi": "10.17487/RFC9170",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
      "updated": "2026-10-20T21:47:24.132Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "href": "https://doi.org/10.17487/RFC9170",
    "href$meta": {
      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
      "updated": "2026-10-20T21:47:24.132Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "keywords": [
      "Extensions",
      "GREASE"
    ],
    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": [
        "Extensions",
        "Grease"
      ],
      "overridden": true,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
      "updated": "2026-10-20T22:12:07.948Z",
      "version": "extractDocs.js@commit:301bfdf288d8"
    },
    "pages": "17",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
      "updated": "2026-10-20T21:47:24.132Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "publicationDate": "2021-12-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
      "updated": "2026-10-20T21:47:24.132Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "publisher": "IETF",
    "publisher$meta": {
      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
      "updated": "2026-10-20T21:47:24.132Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "references": {
      "bibliographic": [
        "RFC7696",
        "RFC7301",
        "RFC7838",
        "RFC6733",
        "RFC7489",
        "RFC6891",
        "10.1145-2068816.2068834",
        "RFC6709",
        "RFC8701",
        "IETF.draft-ietf-httpbis-semantics-19",
        "RFC8941",
        "IETF.draft-ietf-httpbis-messaging-19",
        "RFC8684",
        "10.1016-j.comnet.2020.107211",
        "RFC8558",
        "RFC9000",
        "RFC8999",
        "RFC2113",
        "RFC2711",
        "RFC791",
        "RFC1112",
        "RFC2464",
        "RFC5704",
        "RFC3597",
        "RFC3261",
        "RFC5321",
        "RFC8460",
        "RFC1157",
        "RFC7208",
        "RFC5218",
        "RFC793",
        "RFC7413",
        "RFC6066",
        "RFC5246",
        "RFC8446",
        "RFC8170",
        "orphan/RFC9170/h:e66166be",
        "orphan/RFC9170/h:ea8cccca",
        "orphan/RFC9170/h:6ebc5286",
        "orphan/RFC9170/h:6d9c9597",
        "orphan/RFC9170/h:ffcc70be"
      ],
      "bibliographic$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
        "updated": "2026-10-20T21:47:24.132Z",
        "version": "extractDocs.js@commit:92f3ced618ff"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc9170/",
    "resolvedHref$meta": {
      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
      "updated": "2026-10-20T21:47:24.132Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "status": {
      "active": true,
      "active$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
        "updated": "2026-10-20T21:47:24.132Z",
        "version": "extractDocs.js@commit:92f3ced618ff"
      },
      "errataExist": false,
      "errataExist$meta": {
        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
        "updated": "2026-10-20T21:47:24.132Z",
        "version": "extractDocs.js@commit:92f3ced618ff"
      },
      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
        "updated": "2026-10-20T21:47:24.132Z",
        "version": "extractDocs.js@commit:92f3ced618ff"
      },
      "statusNote": "Informational",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
        "updated": "2026-10-20T21:47:24.132Z",
        "version": "extractDocs.js@commit:92f3ced618ff"
      },
      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc9170/",
        "updated": "2026-10-20T21:47:24.132Z",
        "version": "extractDocs.js@commit:92f3ced618ff"
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}