{
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  "docId": "RFC5511",
  "document": {
    "abstract": "Several protocols have been specified in the Routing Area of the IETF using a common variant of the Backus-Naur Form (BNF) of representing message syntax. However, there is no formal definition of this version of BNF. There is value in using the same variant of BNF for the set of protocols that are commonly used together. This reduces confusion and simplifies implementation. Updating existing documents to use some other variant of BNF that is already formally documented would be a substantial piece of work. This document provides a formal definition of the variant of BNF that has been used (that we call Routing BNF) and makes it available for use by new protocols. [STANDARDS-TRACK]",
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      "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
      "updated": "2026-10-16T18:55:27.466Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "authors": [
      {
        "name": "Adrian Farrel"
      }
    ],
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      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
      "updated": "2026-10-16T18:55:27.466Z",
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    "docId": "RFC5511",
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      "confidence": "high",
      "note": "Derived from RFC number or Datatracker identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
      "updated": "2026-10-16T18:55:27.466Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
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    "docLabel": "IETF RFC 5511",
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      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
      "updated": "2026-10-16T18:55:27.466Z",
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    },
    "docNumber": "5511",
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      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
      "updated": "2026-10-16T18:55:27.466Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "docTitle": "Routing Backus-Naur Form (RBNF): A Syntax Used to Form Encoding Rules in Various Routing Protocol Specifications",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
      "updated": "2026-10-16T18:55:27.466Z",
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    },
    "docType": "Standard",
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      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
      "updated": "2026-10-16T18:55:27.466Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "doi": "10.17487/RFC5511",
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      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
      "updated": "2026-10-16T18:55:27.466Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "href": "https://doi.org/10.17487/RFC5511",
    "href$meta": {
      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
      "updated": "2026-10-16T18:55:27.466Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "keywords": [
      "Routing Bnf"
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    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
      "updated": "2026-10-16T18:55:27.466Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "pages": "14",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
      "updated": "2026-10-16T18:55:27.466Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "publicationDate": "2009-04-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
      "updated": "2026-10-16T18:55:27.466Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "publisher": "IETF",
    "publisher$meta": {
      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
      "updated": "2026-10-16T18:55:27.466Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "references": {
      "bibliographic": [
        "RFC2205",
        "RFC3209",
        "RFC3473",
        "RFC4204",
        "RFC5234",
        "RFC5440",
        "ISO.14977"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=8 proseBlocks=11 skippedAnchorBlocks=9",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
        "updated": "2026-10-16T18:55:27.466Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "normative": [
        "RFC2119"
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      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
        "updated": "2026-10-16T18:55:27.466Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc5511/",
    "resolvedHref$meta": {
      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
      "updated": "2026-10-16T18:55:27.466Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "status": {
      "active": true,
      "active$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
        "updated": "2026-10-16T18:55:27.466Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "errataExist": false,
      "errataExist$meta": {
        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
        "updated": "2026-10-16T18:55:27.466Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
        "updated": "2026-10-16T18:55:27.466Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "statusNote": "Proposed Standard",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
        "updated": "2026-10-16T18:55:27.466Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
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      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5511/",
        "updated": "2026-10-16T18:55:27.466Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
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}