{
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  "sourcePath": "src/main/data/docs",
  "docId": "RFC6540",
  "document": {
    "abstract": "Given the global lack of available IPv4 space, and limitations in IPv4 extension and transition technologies, this document advises that IPv6 support is no longer considered optional. It also cautions that there are places in existing IETF documents where the term \"IP\" is used in a way that could be misunderstood by implementers as the term \"IP\" becomes a generic that can mean IPv4 + IPv6, IPv6-only, or IPv4-only, depending on context and application. This memo documents an Internet Best Current Practice.",
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      "confidence": "high",
      "note": "Parsed from RFC index XML abstract",
      "originalValue": null,
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      "sourceUrl": "https://www.rfc-editor.org/info/rfc6540/",
      "updated": "2026-10-16T20:44:14.339Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "authors": [
      {
        "name": "Wesley George"
      },
      {
        "name": "Chris Donley"
      },
      {
        "name": "Christopher Liljenstolpe"
      },
      {
        "name": "Lee Howard"
      }
    ],
    "authors$meta": {
      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6540/",
      "updated": "2026-10-16T20:44:14.339Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "docId": "RFC6540",
    "docId$meta": {
      "confidence": "high",
      "note": "Derived from RFC number or Datatracker identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6540/",
      "updated": "2026-10-16T20:44:14.339Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "docLabel": "IETF RFC 6540",
    "docLabel$meta": {
      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6540/",
      "updated": "2026-10-16T20:44:14.339Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "docNumber": "6540",
    "docNumber$meta": {
      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6540/",
      "updated": "2026-10-16T20:44:14.339Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "docTitle": "IPv6 Support Required for All IP-Capable Nodes",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6540/",
      "updated": "2026-10-16T20:44:14.339Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "docType": "Best Practice",
    "docType$meta": {
      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6540/",
      "updated": "2026-10-16T20:44:14.339Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "doi": "10.17487/RFC6540",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6540/",
      "updated": "2026-10-16T20:44:14.339Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "href": "https://doi.org/10.17487/RFC6540",
    "href$meta": {
      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6540/",
      "updated": "2026-10-16T20:44:14.339Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "keywords": [
      "IPv4"
    ],
    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": [
        "IPv4",
        "Requirement"
      ],
      "overridden": true,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6540/",
      "updated": "2026-10-17T00:35:14.303Z",
      "version": "extractDocs.js@commit:e15f05a0bdbb"
    },
    "pages": "6",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6540/",
      "updated": "2026-10-16T20:44:14.339Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "publicationDate": "2012-04-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6540/",
      "updated": "2026-10-16T20:44:14.339Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "publisher": "IETF",
    "publisher$meta": {
      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6540/",
      "updated": "2026-10-16T20:44:14.339Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "references": {
      "bibliographic": [
        "RFC1122",
        "RFC1812",
        "RFC1883",
        "RFC2460",
        "RFC6204",
        "RFC6269",
        "RFC6434",
        "orphan/RFC6540/h:0ce5d1e1",
        "orphan/RFC6540/h:8258ed1b",
        "orphan/RFC6540/h:4b405f26"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=10 proseBlocks=13 skippedAnchorBlocks=11",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6540/",
        "updated": "2026-10-16T20:44:14.339Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc6540/",
    "resolvedHref$meta": {
      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6540/",
      "updated": "2026-10-16T20:44:14.339Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "status": {
      "active": true,
      "active$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6540/",
        "updated": "2026-10-16T20:44:14.339Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
      },
      "errataExist": false,
      "errataExist$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/rfc6540/",
        "updated": "2026-10-16T20:44:14.339Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
      },
      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6540/",
        "updated": "2026-10-16T20:44:14.339Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
      },
      "statusNote": "Best Current Practice",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6540/",
        "updated": "2026-10-16T20:44:14.339Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
      },
      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6540/",
        "updated": "2026-10-16T20:44:14.339Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
      }
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}