{
  "fileFormatID": 1233,
  "formatName": "Adobe Portable Document Catalog Index File",
  "version": "2.0",
  "formatDescription": "Adobe Portable Document Catalog Index File (PDX) is the format of a file created when an index is built for a collection of PDF documents defined as a catalog in Adobe Acrobat Pro versions 2.0 and later, allowing users to search through the contents of the catalogue.",
  "releaseDate": null,
  "binaryFileFormat": null,
  "formatNote": "https://helpx.adobe.com/acrobat/using/creating-pdf-indexes.html",
  "lastUpdatedDate": "17 Apr 2024",
  "formatProvenance": "PDX is Adobe Acrobat Catalog Index file, available in Adobe Acrobat versions 2 and later. \r\nWhen created, a PDF Catalog Index will also create a number of dependent sub-files of specific filetypes. \r\nThe extensions for these filetypes within earlier versions of .pdx are .wld, .abt, .did, .ddd, .pdd, .plc, .cat, .trn. \r\nIn later versions only .idx files are created. The Catalog Index creates a fully text-searchable relationship between the indexed pdf files; 11/2023 (v.115)- Modified the offset values in the internal signature from null to 0 as part of a project to match PRONOM data with the xsd standard. Internally researched; 04/2024 (v.118): Description and links added as part of PRONOM Research Week 2023. Submitted by Archives nationales (French National Archives).",
  "formatSourceDate": "28 Aug 2012",
  "formatDisclosure": null,
  "formatEnvironment": null,
  "formatRisk": null,
  "formatAliases": null,
  "formatTypes": null,
  "formatFamilies": null,
  "identifiers": [
    {
      "identifierText": "fmt/446",
      "identifierType": "PUID"
    }
  ],
  "internalSignatures": [
    {
      "signatureID": 698,
      "name": "Adobe PDX 2.0",
      "note": "BOF first 25 bytes: %PDX 2.0....ObjBegin ..<<\r\nEOF last 16 bytes >> ..ObjEnd ....",
      "byteSequences": [
        {
          "positionType": "Absolute from BOF",
          "offset": 0,
          "maxOffset": 0,
          "byteSequence": "2550445820322E300D0A0D0A4F626A426567696E200D0A3C3C",
          "endianness": null,
          "byteSequenceID": 870
        },
        {
          "positionType": "Absolute from EOF",
          "offset": 0,
          "maxOffset": 0,
          "byteSequence": "3E3E200D0A4F626A456E64200D0A0D0A",
          "endianness": null,
          "byteSequenceID": 871
        }
      ],
      "provenance": "Files found within DRI, files found on web, and files self generated via Adobe Acrobat version 4.0; 11/2023 (v.115)- Modified the offset values from null to 0 as part of a project to match PRONOM data with the xsd standard. Internally researched."
    }
  ],
  "externalSignatures": [
    {
      "externalSignature": "pdx",
      "signatureType": "File extension"
    }
  ],
  "relationships": [],
  "submittedBy": [
    1
  ]
}
