{
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    "abstract": "This document captures the problem statement for the Softwires Working Group, which is developing standards for the discovery, control, and encapsulation methods for connecting IPv4 networks across IPv6-only networks as well as IPv6 networks across IPv4-only networks. The standards will encourage multiple, inter-operable vendor implementations by identifying, and extending where necessary, existing standard protocols to resolve a selected set of \"IPv4/IPv6\" and \"IPv6/IPv4\" transition problems. This document describes the specific problems (\"Hubs and Spokes\" and \"Mesh\") that will be solved by the standards developed by the Softwires Working Group. Some requirements (and non-requirements) are also identified to better describe the specific problem scope. This memo provides information for the Internet community.",
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      "updated": "2026-10-16T20:42:19.817Z",
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    "authors": [
      {
        "name": "Xing Li"
      },
      {
        "name": "Spencer Dawkins"
      },
      {
        "name": "David Ward"
      },
      {
        "name": "Alain Durand"
      }
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      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
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      "updated": "2026-10-16T20:42:19.817Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
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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/rfc4925/",
      "updated": "2026-10-16T20:42:19.816Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "docLabel": "IETF RFC 4925",
    "docLabel$meta": {
      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4925/",
      "updated": "2026-10-16T20:42:19.816Z",
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    },
    "docNumber": "4925",
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      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4925/",
      "updated": "2026-10-16T20:42:19.817Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "docTitle": "Softwire Problem Statement",
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      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4925/",
      "updated": "2026-10-16T20:42:19.817Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
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      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4925/",
      "updated": "2026-10-16T20:42:19.817Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "doi": "10.17487/RFC4925",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4925/",
      "updated": "2026-10-16T20:42:19.817Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "href": "https://doi.org/10.17487/RFC4925",
    "href$meta": {
      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4925/",
      "updated": "2026-10-16T20:42:19.817Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "pages": "23",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4925/",
      "updated": "2026-10-16T20:42:19.817Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "publicationDate": "2007-07-01",
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      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4925/",
      "updated": "2026-10-16T20:42:19.817Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "publisher": "IETF",
    "publisher$meta": {
      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4925/",
      "updated": "2026-10-16T20:42:19.817Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "references": {
      "bibliographic": [
        "RFC2131",
        "RFC2462",
        "RFC3315",
        "RFC3633",
        "RFC4364",
        "RFC4365",
        "RFC4891",
        "orphan/RFC4925/h:326b014d",
        "orphan/RFC4925/h:2d4a8b4e",
        "orphan/RFC4925/h:0f9c97a7",
        "orphan/RFC4925/h:ef80682a",
        "orphan/RFC4925/h:99228811"
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      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=17 proseBlocks=22 skippedAnchorBlocks=19",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
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        "updated": "2026-10-16T20:42:19.817Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
      },
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        "RFC3041",
        "RFC3053",
        "RFC3056",
        "RFC3972",
        "RFC4213"
      ],
      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4925/",
        "updated": "2026-10-16T20:42:19.817Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc4925/",
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      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4925/",
      "updated": "2026-10-17T00:33:04.638Z",
      "version": "extractDocs.js@commit:e15f05a0bdbb"
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4925/",
        "updated": "2026-10-16T20:42:19.817Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
      },
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      "errataExist$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/rfc4925/",
        "updated": "2026-10-16T20:42:19.817Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
      },
      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4925/",
        "updated": "2026-10-16T20:42:19.817Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
      },
      "statusNote": "Informational",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4925/",
        "updated": "2026-10-16T20:42:19.817Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
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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/rfc4925/",
        "updated": "2026-10-16T20:42:19.817Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
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}