{
  "$schema": "/api/schemas/documents.schema.json",
  "apiVersion": "1.0.0",
  "generatedAt": "2026-07-09T21:16:49.031Z",
  "sourcePath": "src/main/data/docs",
  "docId": "10.5594-J04809",
  "document": {
    "abbrevTitle": "SMPTE J",
    "abbrevTitle$meta": {
      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J04809.xml)",
      "source": "parsed",
      "updated": "2026-05-22T18:56:53.245Z",
      "version": "smpte-journal-article-nlm@v1"
    },
    "abstract": "For the abstract of this paper which was presented on May 5, 1954, at the Society's Convention at Washington, D.C., see the first installment published in last month's Journal.",
    "abstract$meta": {
      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J04809.xml)",
      "source": "parsed",
      "updated": "2026-05-22T18:56:53.245Z",
      "version": "smpte-journal-article-nlm@v1"
    },
    "authors": [
      {
        "name": "Edward W. Kellogg"
      }
    ],
    "authors$meta": {
      "confidence": "high",
      "note": "Object form (schema 2.3.0) migrated from string form via migrateAuthorsToObjectForm.js; bio/affiliation backfilled from _source/SMPTE/HIGHWIRE/ NLM <contrib-group>+<aff>+<bio>",
      "source": "parsed",
      "updated": "2026-06-23T00:04:25.562Z",
      "version": "authors-migrate-object-form@v1"
    },
    "contentType": "orig-research",
    "contentType$meta": {
      "confidence": "high",
      "note": "Cross-filled from SMPTE canonical repository import (smpte-canonical-audit/canonicalLibrary.*.json); previous value was a placeholder",
      "originalValue": "other",
      "source": "parsed",
      "updated": "2026-07-07T23:39:31.295Z",
      "version": "smpte-canonical-repo@v1"
    },
    "copyright": {
      "holder": "Society of Motion Picture and Television Engineers, Inc.",
      "holder$meta": {
        "confidence": "high",
        "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J04809.xml)",
        "source": "parsed",
        "updated": "2026-05-22T18:56:53.245Z",
        "version": "smpte-journal-article-nlm@v1"
      },
      "year": "1955",
      "year$meta": {
        "confidence": "high",
        "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J04809.xml)",
        "source": "parsed",
        "updated": "2026-05-22T18:56:53.245Z",
        "version": "smpte-journal-article-nlm@v1"
      }
    },
    "copyright$meta": {
      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J04809.xml)",
      "source": "parsed",
      "updated": "2026-05-22T18:56:53.245Z",
      "version": "smpte-journal-article-nlm@v1"
    },
    "docId": "10.5594-J04809",
    "docId$meta": {
      "confidence": "high",
      "note": "Derived from DOI 10.5594/J04809",
      "source": "parsed",
      "updated": "2026-05-22T18:56:53.245Z",
      "version": "smpte-journal-article-nlm@v1"
    },
    "docLabel": "SMPTE Journal ( Volume: 64, Issue: 7, July 1955)",
    "docLabel$meta": {
      "confidence": "medium",
      "note": "Composed from journal title, volume, issue and date",
      "source": "inferred",
      "updated": "2026-05-22T18:56:53.245Z",
      "version": "smpte-journal-article-nlm@v1"
    },
    "docTitle": "Second Installment: History of Sound Motion Pictures",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Title updated from SMPTE canonical repository (2026-07-09 drift review: canonical richer/cleaner; TeX/sup/inf converted to Unicode) (smpte-canonical-audit/canonicalLibrary.*.json)",
      "originalValue": "History of Sound Motion Pictures",
      "source": "parsed",
      "updated": "2026-07-09T15:05:12.415Z",
      "version": "smpte-canonical-repo@v1"
    },
    "docType": "Journal Article",
    "docType$meta": {
      "confidence": "high",
      "note": "NLM <article> — SMPTE journal paper",
      "source": "inferred",
      "updated": "2026-05-22T18:56:53.245Z",
      "version": "smpte-journal-article-nlm@v1"
    },
    "doi": "10.5594/J04809",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J04809.xml)",
      "source": "parsed",
      "updated": "2026-05-22T18:56:53.245Z",
      "version": "smpte-journal-article-nlm@v1"
    },
    "href": "https://doi.org/10.5594/J04809",
    "href$meta": {
      "confidence": "high",
      "note": "Constructed from DOI 10.5594/J04809",
      "source": "inferred",
      "updated": "2026-05-22T18:56:53.245Z",
      "version": "smpte-journal-article-nlm@v1"
    },
    "issn": {
      "print": "0898-0438",
      "print$meta": {
        "confidence": "high",
        "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J04809.xml)",
        "source": "parsed",
        "updated": "2026-05-22T18:56:53.245Z",
        "version": "smpte-journal-article-nlm@v1"
      }
    },
    "issn$meta": {
      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J04809.xml)",
      "source": "parsed",
      "updated": "2026-05-22T18:56:53.245Z",
      "version": "smpte-journal-article-nlm@v1"
    },
    "journalAcronym": "MIJR",
    "journalAcronym$meta": {
      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/DL Project Files/08202015 BACKFILE JOURNAL FRESH/smptej_64_7/MIJR15Vol64No7.xml)",
      "source": "parsed",
      "updated": "2026-06-16T16:11:59.617Z",
      "version": "smpte-journal-issue-xml@v1"
    },
    "journalTitle": "SMPTE Journal 1955",
    "journalTitle$meta": {
      "confidence": "high",
      "note": "Era-accurate journal title from SMPTE canonical repository (periodical parent at time of publication) (smpte-canonical-audit/canonicalLibrary.*.json)",
      "originalValue": null,
      "source": "parsed",
      "updated": "2026-07-08T00:35:38.133Z",
      "version": "smpte-canonical-repo@v1"
    },
    "number": "7",
    "number$meta": {
      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J04809.xml)",
      "source": "parsed",
      "updated": "2026-05-22T18:56:53.245Z",
      "version": "smpte-journal-article-nlm@v1"
    },
    "pages": "356–374",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J04809.xml)",
      "source": "parsed",
      "updated": "2026-05-22T18:56:53.245Z",
      "version": "smpte-journal-article-nlm@v1"
    },
    "publicationDate": "1955-07-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Day absent in NLM source — padded to 01",
      "source": "parsed",
      "updated": "2026-05-22T18:56:53.245Z",
      "version": "smpte-journal-article-nlm@v1"
    },
    "publisher": "SMPTE",
    "publisher$meta": {
      "confidence": "high",
      "note": "Normalised to registry \"SMPTE\" convention from NLM publisher-name (The Society of Motion Picture and Television Engineers)",
      "source": "inferred",
      "updated": "2026-05-22T18:56:53.245Z",
      "version": "smpte-journal-article-nlm@v1"
    },
    "publisherLocation": {
      "city": "White Plains, NY",
      "city$meta": {
        "confidence": "high",
        "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J04809.xml)",
        "source": "parsed",
        "updated": "2026-05-22T18:56:53.245Z",
        "version": "smpte-journal-article-nlm@v1"
      },
      "country": "USA",
      "country$meta": {
        "confidence": "high",
        "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/DL Project Files/08202015 BACKFILE JOURNAL FRESH/smptej_64_7/MIJR15Vol64No7.xml)",
        "source": "parsed",
        "updated": "2026-06-16T16:11:59.617Z",
        "version": "smpte-journal-issue-xml@v1"
      }
    },
    "publisherLocation$meta": {
      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J04809.xml)",
      "source": "parsed",
      "updated": "2026-05-22T18:56:53.245Z",
      "version": "smpte-journal-article-nlm@v1"
    },
    "references": {
      "bibliographic": [
        "10.5594-J12703",
        "10.5594-J08550",
        "10.5594-J08742",
        "10.5594-J01245",
        "10.5594-J08729",
        "10.5594-J17826",
        "10.5594-J11718",
        "10.5594-J14631",
        "10.5594-J08743",
        "10.5594-J05151",
        "10.5594-J09967",
        "10.5594-J14791",
        "10.5594-J08502",
        "10.5594-J05608",
        "10.5594-J10057",
        "10.5594-J10149",
        "10.5594-J01875",
        "10.5594-J08747",
        "10.5594-J07402",
        "10.5594-J06283",
        "10.5594-J08619",
        "10.5594-J09961",
        "10.5594-J12210",
        "10.5594-J12211",
        "10.5594-J12673",
        "10.5594-J00946",
        "10.5594-J00945",
        "10.5594-J00947",
        "10.5594-J09859",
        "10.5594-J12893",
        "10.5594-J01217",
        "10.5594-J05411",
        "10.5594-J05530",
        "10.5594-J05479",
        "10.5594-J07460",
        "10.5594-J12978",
        "10.5594-J13085",
        "10.5594-J14719",
        "10.5594-J10058",
        "10.5594-J08714",
        "10.5594-J12707",
        "10.5594-J14788",
        "10.5594-J08643",
        "10.5594-J16619",
        "10.5594-J10015",
        "10.5594-J14826",
        "10.5594-J06550",
        "10.5594-J05382",
        "10.5594-J07418",
        "10.5594-J16576",
        "10.5594-J13062",
        "10.5594-J08617",
        "10.5594-J13013",
        "10.5594-J10133",
        "10.5594-J08530",
        "10.5594-J14729",
        "10.5594-J05391",
        "10.5594-J09976",
        "10.5594-J06547",
        "10.5594-J01834",
        "10.5594-J18394",
        "10.5594-J07482",
        "10.5594-J05569",
        "10.5594-J08989",
        "10.5594-J05531",
        "10.5594-J05606",
        "10.5594-J08483",
        "10.5594-J09880",
        "10.5594-J14279",
        "10.5594-J13060",
        "10.5594-J09907",
        "10.5594-J01284",
        "10.5594-J06549",
        "10.5594-J05446",
        "10.5594-J07469",
        "10.5594-J10129",
        "10.5594-J08529",
        "10.5594-J11941",
        "10.5594-J10060",
        "10.5594-J08595",
        "10.5594-J08011",
        "10.5594-J14808",
        "10.5594-J13050",
        "10.5594-J07507",
        "10.5594-J14711",
        "10.5594-J09890",
        "10.5594-J14768",
        "10.5594-J05467",
        "10.5594-J08541",
        "10.5594-J12687",
        "10.5594-J17372",
        "10.5594-J07978",
        "10.5594-J05521",
        "10.5594-J08012",
        "10.5594-J17378",
        "10.5594-J09926",
        "10.5594-J08041",
        "10.5594-J00025",
        "10.5594-J12879",
        "10.5594-J06357",
        "10.5594-J11917",
        "10.5594-J16524",
        "10.5594-J08455",
        "10.5594-J14717",
        "10.5594-J11888",
        "10.5594-J11989",
        "10.5594-J11979",
        "10.5594-J12983",
        "10.5594-J05448",
        "10.5594-J09960",
        "10.5594-J14659",
        "10.5594-J07490",
        "10.5594-J08043",
        "10.5594-J01272",
        "10.5594-J11953",
        "10.5594-J05554",
        "10.5594-J08059",
        "10.5594-J08559",
        "10.5594-J01286",
        "10.5594-J05453",
        "10.5594-J08651",
        "10.5594-J08644",
        "10.5594-J08645",
        "10.5594-J11734",
        "10.5594-J04853",
        "10.5594-J12775",
        "10.5594-J11845",
        "orphan/10.5594-J04809/bibr1-10.5594_J04809",
        "orphan/10.5594-J04809/bibr2-10.5594_J04809",
        "orphan/10.5594-J04809/bibr4-10.5594_J04809",
        "orphan/10.5594-J04809/bibr6-10.5594_J04809",
        "orphan/10.5594-J04809/bibr7-10.5594_J04809",
        "orphan/10.5594-J04809/bibr9-10.5594_J04809",
        "orphan/10.5594-J04809/bibr14-10.5594_J04809",
        "orphan/10.5594-J04809/bibr15-10.5594_J04809",
        "orphan/10.5594-J04809/bibr16-10.5594_J04809",
        "orphan/10.5594-J04809/bibr20-10.5594_J04809",
        "orphan/10.5594-J04809/bibr25-10.5594_J04809",
        "orphan/10.5594-J04809/bibr27-10.5594_J04809",
        "orphan/10.5594-J04809/bibr30-10.5594_J04809",
        "orphan/10.5594-J04809/bibr46-10.5594_J04809",
        "orphan/10.5594-J04809/bibr50-10.5594_J04809",
        "orphan/10.5594-J04809/bibr66-10.5594_J04809",
        "orphan/10.5594-J04809/bibr67-10.5594_J04809",
        "orphan/10.5594-J04809/bibr79-10.5594_J04809",
        "orphan/10.5594-J04809/bibr80-10.5594_J04809",
        "orphan/10.5594-J04809/bibr84-10.5594_J04809",
        "orphan/10.5594-J04809/bibr85-10.5594_J04809",
        "orphan/10.5594-J04809/bibr93-10.5594_J04809",
        "orphan/10.5594-J04809/bibr94-10.5594_J04809",
        "orphan/10.5594-J04809/bibr98-10.5594_J04809",
        "orphan/10.5594-J04809/bibr115-10.5594_J04809",
        "orphan/10.5594-J04809/bibr119-10.5594_J04809",
        "orphan/10.5594-J04809/bibr120-10.5594_J04809",
        "orphan/10.5594-J04809/bibr121-10.5594_J04809",
        "orphan/10.5594-J04809/bibr123-10.5594_J04809",
        "orphan/10.5594-J04809/bibr124-10.5594_J04809",
        "orphan/10.5594-J04809/bibr129-10.5594_J04809",
        "orphan/10.5594-J04809/bibr140-10.5594_J04809",
        "orphan/10.5594-J04809/bibr146-10.5594_J04809",
        "orphan/10.5594-J04809/bibr148-10.5594_J04809",
        "orphan/10.5594-J04809/bibr149-10.5594_J04809",
        "orphan/10.5594-J04809/bibr152-10.5594_J04809",
        "orphan/10.5594-J04809/bibr153-10.5594_J04809",
        "orphan/10.5594-J04809/bibr154-10.5594_J04809",
        "orphan/10.5594-J04809/bibr159-10.5594_J04809"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "note": "Extracted from NLM <ref-list> via extractSmpteJournalRefs.js (orphan-slug-mint)",
        "source": "parsed",
        "updated": "2026-07-06T18:21:02.558Z"
      }
    },
    "resolvedHref": "https://journal.smpte.org/periodicals/SMPTE%20Journal%201955/64/7/11/",
    "resolvedHref$meta": {
      "confidence": "high",
      "note": "Backfilled from url.validate report #resolvedHref",
      "originalValue": null,
      "source": "resolved",
      "updated": "2026-06-19T20:59:07.410Z"
    },
    "status": {
      "active": true,
      "active$meta": {
        "confidence": "medium",
        "note": "No explicit status in NLM source — journal articles default active",
        "source": "inferred",
        "updated": "2026-05-22T18:56:53.245Z",
        "version": "smpte-journal-article-nlm@v1"
      }
    },
    "volume": "64",
    "volume$meta": {
      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J04809.xml)",
      "source": "parsed",
      "updated": "2026-05-22T18:56:53.245Z",
      "version": "smpte-journal-article-nlm@v1"
    }
  }
}