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    "abstract": "This document defines the Call Processing Language (CPL), a language to describe and control Internet telephony services. It is designed to be implementable on either network servers or user agents. It is meant to be simple, extensible, easily edited by graphical clients, and independent of operating system or signalling protocol. It is suitable for running on a server where users may not be allowed to execute arbitrary programs, as it has no variables, loops, or ability to run external programs. [STANDARDS-TRACK]",
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    "authors": [
      {
        "name": "Jonathan Lennox"
      },
      {
        "name": "Xiaotao Wu"
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      {
        "name": "Henning Schulzrinne"
      }
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      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
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      "updated": "2026-10-16T15:44:35.304Z",
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      "confidence": "high",
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      "originalValue": null,
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      "updated": "2026-10-16T15:44:35.303Z",
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      "confidence": "high",
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      "updated": "2026-10-16T15:44:35.303Z",
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    "docNumber": "3880",
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      "note": "Parsed from RFC info page report metadata",
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      "updated": "2026-10-16T15:44:35.303Z",
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    "docTitle": "Call Processing Language (CPL): A Language for User Control of Internet Telephony Services",
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      "confidence": "high",
      "note": "Parsed from RFC index XML title",
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      "updated": "2026-10-16T15:44:35.303Z",
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    "docType": "Standard",
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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": "2026-10-16T15:44:35.303Z",
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    },
    "doi": "10.17487/RFC3880",
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      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc3880/",
      "updated": "2026-10-16T15:44:35.304Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
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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/rfc3880/",
      "updated": "2026-10-16T15:44:35.304Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
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      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
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        "CPL",
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc3880/",
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      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc3880/",
      "updated": "2026-10-16T15:44:35.304Z",
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      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc3880/",
      "updated": "2026-10-16T15:44:35.304Z",
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc3880/",
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      "bibliographic": [
        "T-REC-H.323.2003",
        "RFC2824",
        "W3C.html401.19991224",
        "ISO.8879.1986",
        "ISO.8601.2000",
        "W3C.xlink.20010627",
        "RFC3028",
        "T-REC-Q.931.1993",
        "RFC3508"
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        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc3880/",
        "updated": "2026-10-16T15:44:35.304Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
      },
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        "RFC3261",
        "W3C.xml.20040204",
        "RFC2119",
        "RFC3513",
        "UNICODE.STD.TR15-23",
        "UNICODE.STD.TR21-5",
        "RFC3066",
        "RFC2445",
        "RFC2483",
        "W3C.xml-names.19990114",
        "RFC2141",
        "RFC2648",
        "RFC3688",
        "RFC3023",
        "orphan/RFC3880/h:0d6f9152"
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      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc3880/",
        "updated": "2026-10-16T15:44:35.304Z",
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      "confidence": "high",
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      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc3880/",
      "updated": "2026-10-16T15:44:35.304Z",
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc3880/",
        "updated": "2026-10-16T15:44:35.304Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
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        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc3880/",
        "updated": "2026-10-16T15:44:35.304Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
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      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc3880/",
        "updated": "2026-10-16T15:44:35.304Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
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      "statusNote": "Proposed Standard",
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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/rfc3880/",
        "updated": "2026-10-16T15:44:35.304Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc3880/",
        "updated": "2026-10-16T15:44:35.304Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
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