{
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    "abstract": "This document describes a language for filtering email messages at time of final delivery. It is designed to be implementable on either a mail client or mail server. It is meant to be extensible, simple, and independent of access protocol, mail architecture, and operating system. It is suitable for running on a mail server where users may not be allowed to execute arbitrary programs, such as on black box Internet Message Access Protocol (IMAP) servers, as the base language has no variables, loops, or ability to shell out to external programs. [STANDARDS-TRACK]",
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      "confidence": "high",
      "note": "Parsed from RFC index XML abstract",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
      "updated": "2026-10-13T22:24:17.211Z",
      "version": "extractDocs.js@commit:fd871efde64d"
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    "authors": [
      {
        "name": "Philip Guenther"
      },
      {
        "name": "Tim Showalter"
      }
    ],
    "authors$meta": {
      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
      "updated": "2026-10-13T22:24:17.211Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "docId": "RFC5228",
    "docId$meta": {
      "confidence": "high",
      "note": "Derived from RFC number or Datatracker identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
      "updated": "2026-10-13T22:24:17.211Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "docLabel": "IETF RFC 5228",
    "docLabel$meta": {
      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
      "updated": "2026-10-13T22:24:17.211Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "docNumber": "5228",
    "docNumber$meta": {
      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
      "updated": "2026-10-13T22:24:17.211Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "docTitle": "Sieve: An Email Filtering Language",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
      "updated": "2026-10-13T22:24:17.211Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "docType": "Standard",
    "docType$meta": {
      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
      "updated": "2026-10-13T22:24:17.211Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "doi": "10.17487/RFC5228",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
      "updated": "2026-10-13T22:24:17.211Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "href": "https://doi.org/10.17487/RFC5228",
    "href$meta": {
      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
      "updated": "2026-10-13T22:24:17.211Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "pages": "42",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
      "updated": "2026-10-13T22:24:17.211Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "publicationDate": "2008-01-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
      "updated": "2026-10-13T22:24:17.211Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "publisher": "IETF",
    "publisher$meta": {
      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
      "updated": "2026-10-13T22:24:17.211Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "references": {
      "bibliographic": [
        "IEC.60027-2",
        "RFC3464",
        "RFC3501",
        "RFC3798",
        "RFC3028",
        "orphan/RFC5228/h:e5f120c7"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=14 proseBlocks=18 skippedAnchorBlocks=16",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
        "updated": "2026-10-13T22:24:17.211Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
      "normative": [
        "RFC4234",
        "RFC4790",
        "RFC2822",
        "RFC2119",
        "RFC2045",
        "RFC2047",
        "RFC2821",
        "RFC3629"
      ],
      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
        "updated": "2026-10-13T22:24:17.211Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc5228/",
    "resolvedHref$meta": {
      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
      "updated": "2026-10-13T22:24:17.211Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "status": {
      "active": true,
      "active$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
        "updated": "2026-10-13T22:24:17.211Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
      "amendedBy": [
        "RFC5229",
        "RFC5429",
        "RFC6785",
        "RFC9042"
      ],
      "amendedBy$meta": {
        "confidence": "high",
        "note": "Parsed from RFC index XML",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
        "updated": "2026-10-13T22:24:17.211Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
      "errataExist": true,
      "errataExist$meta": {
        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
        "updated": "2026-10-13T22:24:17.211Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
      "errataUrl": [
        "https://www.rfc-editor.org/errata/rfc5228",
        "https://www.rfc-editor.org/errata_search.php?rfc=5228",
        "https://www.rfc-editor.org/rfc/inline-errata/rfc5228.html"
      ],
      "errataUrl$meta": {
        "confidence": "high",
        "note": "Parsed from errata links on RFC/Datatracker pages",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
        "updated": "2026-10-13T22:24:17.211Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
        "updated": "2026-10-13T22:24:17.211Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
      "statusNote": "Proposed Standard",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
        "updated": "2026-10-13T22:24:17.211Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
        "updated": "2026-10-13T22:24:17.211Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
      "supersedes": [
        "RFC3028"
      ],
      "supersedes$meta": {
        "confidence": "high",
        "note": "Parsed from RFC index XML",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5228/",
        "updated": "2026-10-13T22:24:17.211Z",
        "version": "extractDocs.js@commit:fd871efde64d"
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}