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    "abstract": "This standard specifies the absolute luminance level, white point chromaticity, and luminance uniformity of the reflected screen light for the presentation of motion pictures by projectors with digital light engines in review rooms and commercial cinemas. It is the purpose of this specification to achieve the tone scale and contrast in the projected image that will correspond to that intended during the mastering process. ",
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      "note": "Cross-filled from Zoho standards export (_source/SMPTE/Zoho/SMPTE Standards Document Zoho Export 2026-05-21.json)",
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        "confidence": "high",
        "note": "Cross-filled from Zoho standards export (_source/SMPTE/Zoho/SMPTE Standards Document Zoho Export 2026-05-21.json)",
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        "version": "smpte-zoho-standards@v1"
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    "copyright$meta": {
      "confidence": "high",
      "note": "Cross-filled from Zoho standards export (_source/SMPTE/Zoho/SMPTE Standards Document Zoho Export 2026-05-21.json)",
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      "updated": "2026-06-15T20:08:45.039Z",
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    "docId": "SMPTE.ST431-1.2006",
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      "confidence": "high",
      "note": "Calculated from parsed/inferred metadata",
      "originalValue": null,
      "source": "manual",
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      "updated": "2025-10-30T00:00:00Z"
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    "docLabel": "SMPTE ST 431-1:2006",
    "docLabel$meta": {
      "confidence": "medium",
      "source": "manual",
      "updated": "2025-07-01T00:00:00Z"
    },
    "docNumber": "431",
    "docNumber$meta": {
      "confidence": "medium",
      "source": "manual",
      "updated": "2025-07-01T00:00:00Z"
    },
    "docPart": "1",
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      "confidence": "medium",
      "source": "manual",
      "updated": "2025-07-01T00:00:00Z"
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      "originalValue": null,
      "source": "parsed",
      "updated": "2025-12-12T21:28:21.934Z",
      "version": "extractDocs.js@commit:e5213a0e988e"
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    "docTitle": "Screen Luminance Level, Chromaticity and Uniformity",
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      "note": "Parsed from HTML pubTitle, or derived from wrapper title for PDF releases",
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      "confidence": "medium",
      "source": "manual",
      "updated": "2025-07-01T00:00:00Z"
    },
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      "confidence": "medium",
      "source": "manual",
      "updated": "2025-07-01T00:00:00Z"
    },
    "group": "smpte-27c-tc",
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      "confidence": "medium",
      "source": "manual",
      "updated": "2025-07-01T00:00:00Z"
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    "href$meta": {
      "confidence": "medium",
      "source": "manual",
      "updated": "2025-07-01T00:00:00Z"
    },
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      {
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    "icsCodes$meta": {
      "confidence": "high",
      "note": "Cross-filled from Zoho standards export (_source/SMPTE/Zoho/SMPTE Standards Document Zoho Export 2026-05-21.json)",
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      "updated": "2026-06-15T20:44:42.037Z",
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      "confidence": "high",
      "note": "Cross-filled from Zoho standards export (_source/SMPTE/Zoho/SMPTE Standards Document Zoho Export 2026-05-21.json)",
      "source": "parsed",
      "updated": "2026-06-15T20:04:58.507Z",
      "version": "smpte-zoho-standards@v1"
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      "Quality",
      "Projection",
      "Measurement",
      "Image",
      "Projector"
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    "keywords$meta": {
      "confidence": "high",
      "note": "Cross-filled from Zoho standards export (_source/SMPTE/Zoho/SMPTE Standards Document Zoho Export 2026-05-21.json); registry value merged with Zoho's set (union deduped)",
      "originalValue": [
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        "Image"
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      "source": "parsed",
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      "version": "smpte-zoho-standards@v1"
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      "confidence": "high",
      "note": "Cross-filled from Zoho standards export (_source/SMPTE/Zoho/SMPTE Standards Document Zoho Export 2026-05-21.json)",
      "source": "parsed",
      "updated": "2026-06-15T20:12:21.844Z",
      "version": "smpte-zoho-standards@v1"
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    "productNumber$meta": {
      "confidence": "high",
      "note": "Cross-filled from Zoho standards export (_source/SMPTE/Zoho/SMPTE Standards Document Zoho Export 2026-05-21.json)",
      "source": "parsed",
      "updated": "2026-06-15T20:11:00.505Z",
      "version": "smpte-zoho-standards@v1"
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    "publicationDate": "2006-04-18",
    "publicationDate$meta": {
      "confidence": "medium",
      "source": "manual",
      "updated": "2025-07-01T00:00:00Z"
    },
    "publisher": "SMPTE",
    "publisher$meta": {
      "confidence": "medium",
      "source": "manual",
      "updated": "2025-07-01T00:00:00Z"
    },
    "references": {
      "bibliographic": [
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        "SMPTE.RP98.1995"
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      "bibliographic$meta": {
        "confidence": "medium",
        "source": "manual",
        "updated": "2025-07-01T00:00:00Z"
      },
      "normative": [
        "ISO.10527.1991"
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      "normative$meta": {
        "confidence": "medium",
        "source": "manual",
        "updated": "2025-07-01T00:00:00Z"
      }
    },
    "relatedDocs": [
      "ISO.26431-1.2008"
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    "relatedDocs$meta": {
      "confidence": "medium",
      "source": "manual",
      "updated": "2025-07-01T00:00:00Z"
    },
    "releaseTag": "20060418-pub",
    "releaseTag$meta": {
      "confidence": "high",
      "note": "Release tag parsed from URL folder structure",
      "originalValue": null,
      "source": "parsed",
      "updated": "2025-10-08T05:51:04.382Z"
    },
    "repo": "https://github.com/SMPTE/st431-1/",
    "repo$meta": {
      "confidence": "medium",
      "source": "manual",
      "updated": "2025-07-01T00:00:00Z"
    },
    "resolvedHref": "https://pub.smpte.org/doc/st431-1/20060418-pub/",
    "resolvedHref$meta": {
      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": "https://my.smpte.org/s/product-details?id=a1BVR0000007Ngg",
      "overridden": true,
      "source": "resolved",
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      "version": "extractDocs.js@commit:ee2844fb1cf2"
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      "active$meta": {
        "confidence": "medium",
        "source": "manual",
        "updated": "2025-07-01T00:00:00Z"
      },
      "amended": false,
      "amended$meta": {
        "confidence": "high",
        "note": "Parsed from wrapper #amendments",
        "originalValue": null,
        "source": "parsed",
        "updated": "2025-10-08T05:51:04.382Z"
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        "note": "Calculated from the releaseTag(s)",
        "originalValue": null,
        "source": "resolved",
        "updated": "2025-10-08T05:51:04.382Z"
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      "reaffirmDate": "2018-03-15",
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        "confidence": "medium",
        "source": "manual",
        "updated": "2025-07-01T00:00:00Z"
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      "reaffirmed": true,
      "reaffirmed$meta": {
        "confidence": "medium",
        "source": "manual",
        "updated": "2025-07-01T00:00:00Z"
      },
      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Calculated from the releaseTag(s)",
        "originalValue": null,
        "source": "resolved",
        "updated": "2025-10-08T05:51:04.382Z"
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