{
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    "abstract": "This note discusses how to extend the DNS with new data for a new application. DNS extension discussions too often focus on reuse of the TXT Resource Record Type. This document lists different mechanisms to extend the DNS, and concludes that the use of a new DNS Resource Record Type is the best solution. This memo provides information for the Internet community.",
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    "authors": [
      {
        "name": "IAB"
      },
      {
        "name": "Patrik Fältström"
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      {
        "name": "Rob Austein"
      },
      {
        "name": "Peter Koch"
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      "confidence": "high",
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      "confidence": "high",
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      "confidence": "high",
      "note": "Constructed from provider and document identifier",
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      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5507/",
      "updated": "2026-10-16T18:55:26.700Z",
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    "docNumber": "5507",
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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/rfc5507/",
      "updated": "2026-10-16T18:55:26.700Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
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    "docTitle": "Design Choices When Expanding the DNS",
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      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5507/",
      "updated": "2026-10-16T18:55:26.700Z",
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      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
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      "updated": "2026-10-16T18:55:26.700Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "doi": "10.17487/RFC5507",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5507/",
      "updated": "2026-10-16T18:55:26.700Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
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      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5507/",
      "updated": "2026-10-16T18:55:26.700Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
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      "DNS",
      "Resource Record Type"
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    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5507/",
      "updated": "2026-10-16T18:55:26.700Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
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    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5507/",
      "updated": "2026-10-16T18:55:26.700Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "publicationDate": "2009-04-01",
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      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5507/",
      "updated": "2026-10-16T18:55:26.700Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
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    "publisher": "IETF",
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      "confidence": "high",
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5507/",
      "updated": "2026-10-16T18:55:26.700Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
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        "RFC1535",
        "RFC2163",
        "RFC2181",
        "RFC2672",
        "RFC3445",
        "RFC3467",
        "RFC3761",
        "RFC4033",
        "RFC4034",
        "RFC4035",
        "RFC4511",
        "RFC4592",
        "RFC4871",
        "orphan/RFC5507/h:3e9d903e",
        "orphan/RFC5507/h:c60ea05d"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=22 proseBlocks=27 skippedAnchorBlocks=24",
        "note": "Parsed from RFC HTML references/informative sections",
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        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
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        "RFC1464",
        "RFC2535",
        "RFC2671",
        "RFC3597",
        "RFC5395"
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        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
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        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5507/",
        "updated": "2026-10-16T18:55:26.700Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
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      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
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      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5507/",
      "updated": "2026-10-16T19:29:33.981Z",
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5507/",
        "updated": "2026-10-16T18:55:26.700Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
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      "errataExist": false,
      "errataExist$meta": {
        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5507/",
        "updated": "2026-10-16T18:55:26.700Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
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      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5507/",
        "updated": "2026-10-16T18:55:26.700Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
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      "statusNote": "Informational",
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        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5507/",
        "updated": "2026-10-16T18:55:26.700Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
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      "superseded": false,
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        "confidence": "high",
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        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5507/",
        "updated": "2026-10-16T18:55:26.700Z",
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