{
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  "apiVersion": "1.1.0",
  "lastModified": "2026-10-16T16:57:24.763Z",
  "sourcePath": "src/main/data/docs",
  "docId": "RFC4189",
  "document": {
    "abstract": "A Session Initiation Protocol (SIP) User Agent (UA) does not always trust all intermediaries in its request path to inspect its message bodies and/or headers contained in its message. The UA might want to protect the message bodies and/or headers from intermediaries, except those that provide services based on its content. This situation requires a mechanism called \"end-to-middle security\" to secure the information passed between the UA and intermediaries, which does not interfere with end-to-end security. This document defines a set of requirements for a mechanism to achieve end-to-middle security. This memo provides information for the Internet community.",
    "abstract$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML abstract",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4189/",
      "updated": "2026-10-16T15:45:20.589Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "authors": [
      {
        "name": "Kumiko Ono"
      },
      {
        "name": "Shinya Tachimoto"
      }
    ],
    "authors$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/rfc4189/",
      "updated": "2026-10-16T15:45:20.589Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "docId": "RFC4189",
    "docId$meta": {
      "confidence": "high",
      "note": "Derived from RFC number or Datatracker identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4189/",
      "updated": "2026-10-16T15:45:20.589Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "docLabel": "IETF RFC 4189",
    "docLabel$meta": {
      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4189/",
      "updated": "2026-10-16T15:45:20.589Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "docNumber": "4189",
    "docNumber$meta": {
      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4189/",
      "updated": "2026-10-16T15:45:20.589Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "docTitle": "Requirements for End-to-Middle Security for the Session Initiation Protocol (SIP)",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4189/",
      "updated": "2026-10-16T15:45:20.589Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "docType": "Informational",
    "docType$meta": {
      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4189/",
      "updated": "2026-10-16T15:45:20.589Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "doi": "10.17487/RFC4189",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4189/",
      "updated": "2026-10-16T15:45:20.589Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "href": "https://doi.org/10.17487/RFC4189",
    "href$meta": {
      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4189/",
      "updated": "2026-10-16T15:45:20.589Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "keywords": [
      "User Agent"
    ],
    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": [
        "User Agent",
        "Intermediaries"
      ],
      "overridden": true,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4189/",
      "updated": "2026-10-16T16:57:24.763Z",
      "version": "extractDocs.js@commit:30d92d8ed083"
    },
    "pages": "12",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4189/",
      "updated": "2026-10-16T15:45:20.589Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "publicationDate": "2005-10-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4189/",
      "updated": "2026-10-16T15:45:20.589Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "publisher": "IETF",
    "publisher$meta": {
      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4189/",
      "updated": "2026-10-16T15:45:20.589Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "references": {
      "bibliographic": [
        "RFC2246",
        "RFC3850",
        "RFC3428",
        "RFC4119",
        "RFC3893",
        "RFC2617",
        "RFC2327",
        "RFC3303",
        "RFC3711",
        "RFC3852"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=12 proseBlocks=18 skippedAnchorBlocks=14",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4189/",
        "updated": "2026-10-16T15:45:20.589Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
      },
      "normative": [
        "RFC2119",
        "RFC3261"
      ],
      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4189/",
        "updated": "2026-10-16T15:45:20.589Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc4189/",
    "resolvedHref$meta": {
      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4189/",
      "updated": "2026-10-16T15:45:20.589Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "status": {
      "active": true,
      "active$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4189/",
        "updated": "2026-10-16T15:45:20.589Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
      },
      "errataExist": false,
      "errataExist$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/rfc4189/",
        "updated": "2026-10-16T15:45:20.589Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
      },
      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4189/",
        "updated": "2026-10-16T15:45:20.589Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
      },
      "statusNote": "Informational",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4189/",
        "updated": "2026-10-16T15:45:20.589Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
      },
      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4189/",
        "updated": "2026-10-16T15:45:20.589Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
      }
    }
  }
}