{
  "fileFormatID": 201,
  "formatName": "Silicon Graphics Image",
  "version": null,
  "formatDescription": "Silicon Graphics Image (SGI) or the RGB file format is the native raster graphics file format for Silicon Graphics workstations",
  "releaseDate": null,
  "binaryFileFormat": "Text",
  "formatNote": null,
  "lastUpdatedDate": "16 Mar 2012",
  "formatProvenance": null,
  "formatSourceDate": "02 Aug 2005",
  "formatDisclosure": null,
  "formatEnvironment": null,
  "formatRisk": null,
  "formatAliases": null,
  "formatTypes": "Image (Raster)",
  "formatFamilies": null,
  "identifiers": [
    {
      "identifierText": "image/x-sgi-bw",
      "identifierType": "MIME"
    },
    {
      "identifierText": "x-fmt/140",
      "identifierType": "PUID"
    }
  ],
  "internalSignatures": [
    {
      "signatureID": 623,
      "name": "Silicon Graphics Image",
      "note": "Magic number (integer 474=0x01DA) + storage format (0 or 1) + number of bytes per pixel channel(1 or 2) + Number of dimensions (1, 2 or 3)+ number of channels (1, 3, or 4) + dummy + colour map id",
      "byteSequences": [
        {
          "positionType": "Absolute from BOF",
          "offset": 0,
          "maxOffset": null,
          "byteSequence": "01DA(00|01)(01|02)00(01|02|03){4}00(01|03|04){80}00(00|01|02|03){368}0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
          "endianness": "Big-endian",
          "byteSequenceID": 770
        }
      ],
      "provenance": "Paul Haeberli . The SGI Image File Format, Version 1.00, Silicon Graphics Computer Systems\nhttp://paulbourke.net/dataformats/sgirgb/sgiversion.html"
    }
  ],
  "externalSignatures": [
    {
      "externalSignature": "bw",
      "signatureType": "File extension"
    },
    {
      "externalSignature": "rgb",
      "signatureType": "File extension"
    }
  ],
  "relationships": [],
  "submittedBy": [
    1
  ]
}