{
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    "abstract": "This document attempts to address some of the issues involved in building a disconnected IMAP4 client. In particular, it deals with the issues of what might be called the \"driver\" portion of the synchronization tool: the portion of the code responsible for issuing the correct set of IMAP4 commands to synchronize the disconnected client in the way that is most likely to make the human who uses the disconnected client happy. This note describes different strategies that can be used by disconnected clients and shows how to use IMAP protocol in order to minimize the time of the synchronization process. This note also lists IMAP extensions that a server should implement in order to provide better synchronization facilities to disconnected clients. This memo provides information for the Internet community.",
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    "authors": [
      {
        "name": "Alexey Melnikov"
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      "confidence": "high",
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      "updated": "2026-10-16T15:46:18.802Z",
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      "confidence": "high",
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      "originalValue": null,
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      "sourceUrl": "https://www.rfc-editor.org/info/rfc4549/",
      "updated": "2026-10-16T15:46:18.802Z",
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      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4549/",
      "updated": "2026-10-16T15:46:18.802Z",
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    "docNumber": "4549",
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      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4549/",
      "updated": "2026-10-16T15:46:18.802Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "docTitle": "Synchronization Operations for Disconnected IMAP4 Clients",
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      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4549/",
      "updated": "2026-10-16T15:46:18.802Z",
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      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
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      "updated": "2026-10-16T15:46:18.802Z",
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    },
    "doi": "10.17487/RFC4549",
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      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
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      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4549/",
      "updated": "2026-10-16T15:46:18.802Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
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    "href": "https://doi.org/10.17487/RFC4549",
    "href$meta": {
      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4549/",
      "updated": "2026-10-16T15:46:18.802Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
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      "IMAP"
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      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4549/",
      "updated": "2026-10-16T15:46:18.802Z",
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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/rfc4549/",
      "updated": "2026-10-16T15:46:18.802Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "publicationDate": "2006-06-01",
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      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4549/",
      "updated": "2026-10-16T15:46:18.802Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "publisher": "IETF",
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      "confidence": "high",
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4549/",
      "updated": "2026-10-16T15:46:18.802Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
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        "RFC1733"
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        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=9 proseBlocks=13 skippedAnchorBlocks=11",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
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        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4549/",
        "updated": "2026-10-16T15:46:18.802Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
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      "normative": [
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        "RFC3501",
        "RFC4315",
        "RFC4551",
        "RFC3502",
        "RFC3691",
        "RFC2683",
        "RFC2088"
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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/rfc4549/",
        "updated": "2026-10-16T15:46:18.802Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
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    "resolvedHref": "https://www.rfc-editor.org/info/rfc4549/",
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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/rfc4549/",
      "updated": "2026-10-16T15:46:18.802Z",
      "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/rfc4549/",
        "updated": "2026-10-16T15:46:18.802Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
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      "errataExist$meta": {
        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4549/",
        "updated": "2026-10-16T15:46:18.802Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
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      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4549/",
        "updated": "2026-10-16T15:46:18.802Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
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      "statusNote": "Informational",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4549/",
        "updated": "2026-10-16T15:46:18.802Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
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      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4549/",
        "updated": "2026-10-16T15:46:18.802Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
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