{
  "fileFormatID": 647,
  "formatName": "Macromedia Flash",
  "version": "2",
  "formatDescription": "The Adobe Flash format, SWF, previously known as Shockwave Flash or Macromedia Shockwave Flash, and alternatively known as the Small Web Format, is a file format primarily designed for creating interactive multimedia applications. The format iterates rapidly, often in line with new releases of Adobe Flash or Adobe Air. Prior to version 6 all SWF files were uncompressed, however version 6 introduced the option of using zlib compression. Version 13 introduced the option of using LZMA compression.",
  "releaseDate": null,
  "binaryFileFormat": "Binary",
  "formatNote": null,
  "lastUpdatedDate": "14 Sep 2018",
  "formatProvenance": "http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/devnet/swf/pdf/swf-file-format-spec.pdf\r\nhttp://www.adobe.com/devnet/articles/flashplayer-air-feature-list.html",
  "formatSourceDate": "11 Mar 2005",
  "formatDisclosure": null,
  "formatEnvironment": null,
  "formatRisk": null,
  "formatAliases": "SWF (2)",
  "formatTypes": null,
  "formatFamilies": null,
  "identifiers": [
    {
      "identifierText": "application/x-shockwave-flash",
      "identifierType": "MIME"
    },
    {
      "identifierText": "fmt/105",
      "identifierType": "PUID"
    }
  ],
  "internalSignatures": [
    {
      "signatureID": 43,
      "name": "SWF 2",
      "note": "Header (FWS then version number) and end tag (..)",
      "byteSequences": [
        {
          "positionType": "Absolute from BOF",
          "offset": 0,
          "maxOffset": null,
          "byteSequence": "46575302",
          "endianness": "Little-endian",
          "byteSequenceID": 136
        },
        {
          "positionType": "Absolute from EOF",
          "offset": 0,
          "maxOffset": null,
          "byteSequence": "0000",
          "endianness": "Little-endian",
          "byteSequenceID": 137
        }
      ]
    }
  ],
  "externalSignatures": [
    {
      "externalSignature": "swf",
      "signatureType": "File extension"
    }
  ],
  "relationships": [
    {
      "relationshipType": "Has priority over",
      "relatedFormatID": 687,
      "relatedFormatName": "MPEG 1/2 Audio Layer 3",
      "relatedFormatPUID": "fmt/134"
    },
    {
      "relationshipType": "Is previous version of",
      "relatedFormatID": 648,
      "relatedFormatName": "Macromedia Flash",
      "relatedFormatPUID": "fmt/106"
    },
    {
      "relationshipType": "Is subsequent version of",
      "relatedFormatID": 646,
      "relatedFormatName": "Macromedia Flash",
      "relatedFormatPUID": "fmt/104"
    }
  ],
  "supportedBy": [
    7
  ],
  "developedBy": [
    56
  ],
  "submittedBy": [
    1
  ]
}