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  "formatDescription": "Portable Network Graphics (PNG) was designed for the lossless, portable, compressed storage of raster images.  PNG provides a patent-free replacement for GIF and can also replace many common uses of TIFF. Indexed-color, grayscale, and truecolor images are supported, plus an optional alpha channel. Sample depths range from 1 to 16 bits. PNG is designed to work in online viewing applications, so it is fully streamable.  It can store gamma and chromaticity.  PNG also detects file corruption.",
  "releaseDate": null,
  "binaryFileFormat": "Binary",
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  "formatEnvironment": null,
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      "identifierText": "fmt/11",
      "identifierType": "PUID"
    },
    {
      "identifierText": "image/png",
      "identifierType": "MIME"
    },
    {
      "identifierText": "public.png",
      "identifierType": "Apple Uniform Type Identifier"
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    {
      "signatureID": 58,
      "name": "PNG 1.0",
      "note": "Signature + IHDR chunk at BOF, IEND chunk at EOF",
      "byteSequences": [
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          "positionType": "Absolute from BOF",
          "offset": 0,
          "maxOffset": 0,
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          "positionType": "Absolute from EOF",
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          "maxOffset": 4,
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          "endianness": "Big-endian",
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  ],
  "externalSignatures": [
    {
      "externalSignature": "png",
      "signatureType": "File extension"
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  "relationships": [
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      "relationshipType": "Has lower priority than",
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      "relatedFormatName": "Portable Network Graphics",
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      "relationshipType": "Has lower priority than",
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      "relationshipType": "Has lower priority than",
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      "relationshipType": "Is previous version of",
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}