{
  "$schema": "/api/schemas/documents.schema.json",
  "apiVersion": "1.1.0",
  "lastModified": "2026-10-21T16:57:45.158Z",
  "sourcePath": "src/main/data/docs",
  "docId": "RFC6947",
  "document": {
    "abstract": "This document proposes a mechanism that allows the same SDP offer to carry multiple IP addresses of different address families (e.g., IPv4 and IPv6). The proposed attribute, the \"altc\" attribute, solves the backward-compatibility problem that plagued Alternative Network Address Types (ANAT) due to their syntax. The proposed solution is applicable to scenarios where connectivity checks are not required. If connectivity checks are required, Interactive Connectivity Establishment (ICE), as specified in RFC 5245, provides such a solution.",
    "abstract$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML abstract",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6947/",
      "updated": "2026-10-21T16:57:45.158Z",
      "version": "extractDocs.js@commit:2c1e5418e9d0"
    },
    "authors": [
      {
        "name": "Mohamed Boucadair"
      },
      {
        "name": "Hadriel Kaplan"
      },
      {
        "name": "Robert Gilman"
      },
      {
        "name": "Simo Veikkolainen"
      }
    ],
    "authors$meta": {
      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6947/",
      "updated": "2026-10-21T16:57:45.158Z",
      "version": "extractDocs.js@commit:2c1e5418e9d0"
    },
    "docId": "RFC6947",
    "docId$meta": {
      "confidence": "high",
      "note": "Derived from RFC number or Datatracker identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6947/",
      "updated": "2026-10-21T16:57:45.158Z",
      "version": "extractDocs.js@commit:2c1e5418e9d0"
    },
    "docLabel": "IETF RFC 6947",
    "docLabel$meta": {
      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6947/",
      "updated": "2026-10-21T16:57:45.158Z",
      "version": "extractDocs.js@commit:2c1e5418e9d0"
    },
    "docNumber": "6947",
    "docNumber$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/rfc6947/",
      "updated": "2026-10-21T16:57:45.158Z",
      "version": "extractDocs.js@commit:2c1e5418e9d0"
    },
    "docTitle": "The Session Description Protocol (SDP) Alternate Connectivity (ALTC) Attribute",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6947/",
      "updated": "2026-10-21T16:57:45.158Z",
      "version": "extractDocs.js@commit:2c1e5418e9d0"
    },
    "docType": "Informational",
    "docType$meta": {
      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6947/",
      "updated": "2026-10-21T16:57:45.158Z",
      "version": "extractDocs.js@commit:2c1e5418e9d0"
    },
    "doi": "10.17487/RFC6947",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6947/",
      "updated": "2026-10-21T16:57:45.158Z",
      "version": "extractDocs.js@commit:2c1e5418e9d0"
    },
    "href": "https://doi.org/10.17487/RFC6947",
    "href$meta": {
      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6947/",
      "updated": "2026-10-21T16:57:45.158Z",
      "version": "extractDocs.js@commit:2c1e5418e9d0"
    },
    "pages": "24",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6947/",
      "updated": "2026-10-21T16:57:45.158Z",
      "version": "extractDocs.js@commit:2c1e5418e9d0"
    },
    "publicationDate": "2013-05-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6947/",
      "updated": "2026-10-21T16:57:45.158Z",
      "version": "extractDocs.js@commit:2c1e5418e9d0"
    },
    "publisher": "IETF",
    "publisher$meta": {
      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6947/",
      "updated": "2026-10-21T16:57:45.158Z",
      "version": "extractDocs.js@commit:2c1e5418e9d0"
    },
    "references": {
      "bibliographic": [
        "RFC2871",
        "RFC4091",
        "RFC4092",
        "RFC5245",
        "RFC5853",
        "RFC5939",
        "RFC6146",
        "RFC6157",
        "RFC6333",
        "RFC6406",
        "RFC6888",
        "orphan/RFC6947/h:d4a4bc13",
        "orphan/RFC6947/h:5840aae4",
        "orphan/RFC6947/h:fa9c7b0e",
        "orphan/RFC6947/h:67746c3b",
        "orphan/RFC6947/h:b3df4c03"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=22 proseBlocks=32 skippedAnchorBlocks=25",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6947/",
        "updated": "2026-10-21T16:57:45.158Z",
        "version": "extractDocs.js@commit:2c1e5418e9d0"
      },
      "normative": [
        "RFC2119",
        "RFC3261",
        "RFC3605",
        "RFC4566",
        "RFC5234",
        "RFC5761"
      ],
      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6947/",
        "updated": "2026-10-21T16:57:45.158Z",
        "version": "extractDocs.js@commit:2c1e5418e9d0"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc6947/",
    "resolvedHref$meta": {
      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6947/",
      "updated": "2026-10-21T16:57:45.158Z",
      "version": "extractDocs.js@commit:2c1e5418e9d0"
    },
    "status": {
      "active": true,
      "active$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6947/",
        "updated": "2026-10-21T16:57:45.158Z",
        "version": "extractDocs.js@commit:2c1e5418e9d0"
      },
      "errataExist": false,
      "errataExist$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/rfc6947/",
        "updated": "2026-10-21T16:57:45.158Z",
        "version": "extractDocs.js@commit:2c1e5418e9d0"
      },
      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6947/",
        "updated": "2026-10-21T16:57:45.158Z",
        "version": "extractDocs.js@commit:2c1e5418e9d0"
      },
      "statusNote": "Informational",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6947/",
        "updated": "2026-10-21T16:57:45.158Z",
        "version": "extractDocs.js@commit:2c1e5418e9d0"
      },
      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6947/",
        "updated": "2026-10-21T16:57:45.158Z",
        "version": "extractDocs.js@commit:2c1e5418e9d0"
      }
    }
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}