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      "number": "4.4.2",
      "spec": "PNG",
      "text": "Indexing",
      "url": "https://www.w3.org/TR/png-3/#4Concepts.Indexing"
    }
  },
  "#4Concepts.Introduction": {
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      "spec": "PNG",
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      "url": "https://w3c.github.io/png/#4Concepts.Introduction"
    },
    "snapshot": {
      "number": "",
      "spec": "PNG",
      "text": "Introduction",
      "url": "https://www.w3.org/TR/png-3/#4Concepts.Introduction"
    }
  },
  "#4Concepts.PNGImage": {
    "current": {
      "number": "4.5",
      "spec": "PNG",
      "text": "PNG image",
      "url": "https://w3c.github.io/png/#4Concepts.PNGImage"
    },
    "snapshot": {
      "number": "4.5",
      "spec": "PNG",
      "text": "PNG image",
      "url": "https://www.w3.org/TR/png-3/#4Concepts.PNGImage"
    }
  },
  "#4Concepts.PNGImageTransformation": {
    "current": {
      "number": "4.4",
      "spec": "PNG",
      "text": "Reference image to PNG image transformation",
      "url": "https://w3c.github.io/png/#4Concepts.PNGImageTransformation"
    },
    "snapshot": {
      "number": "4.4",
      "spec": "PNG",
      "text": "Reference image to PNG image transformation",
      "url": "https://www.w3.org/TR/png-3/#4Concepts.PNGImageTransformation"
    }
  },
  "#4Concepts.RGBMerging": {
    "current": {
      "number": "4.4.3",
      "spec": "PNG",
      "text": "RGB merging",
      "url": "https://w3c.github.io/png/#4Concepts.RGBMerging"
    },
    "snapshot": {
      "number": "4.4.3",
      "spec": "PNG",
      "text": "RGB merging",
      "url": "https://www.w3.org/TR/png-3/#4Concepts.RGBMerging"
    }
  },
  "#4Concepts.Registration": {
    "current": {
      "number": "4.11",
      "spec": "PNG",
      "text": "Extensions",
      "url": "https://w3c.github.io/png/#4Concepts.Registration"
    },
    "snapshot": {
      "number": "4.11",
      "spec": "PNG",
      "text": "Extensions",
      "url": "https://www.w3.org/TR/png-3/#4Concepts.Registration"
    }
  },
  "#4Concepts.Scaling": {
    "current": {
      "number": "4.4.5",
      "spec": "PNG",
      "text": "Sample depth scaling",
      "url": "https://w3c.github.io/png/#4Concepts.Scaling"
    },
    "snapshot": {
      "number": "4.4.5",
      "spec": "PNG",
      "text": "Sample depth scaling",
      "url": "https://www.w3.org/TR/png-3/#4Concepts.Scaling"
    }
  },
  "#4Concepts.Sourceimage": {
    "current": {
      "number": "4.2",
      "spec": "PNG",
      "text": "Images",
      "url": "https://w3c.github.io/png/#images"
    },
    "snapshot": {
      "number": "4.2",
      "spec": "PNG",
      "text": "Images",
      "url": "https://www.w3.org/TR/png-3/#images"
    }
  },
  "#5CRC-algorithm": {
    "current": {
      "number": "5.5",
      "spec": "PNG",
      "text": "CRC algorithm",
      "url": "https://w3c.github.io/png/#5CRC-algorithm"
    },
    "snapshot": {
      "number": "5.5",
      "spec": "PNG",
      "text": "CRC algorithm",
      "url": "https://www.w3.org/TR/png-3/#5CRC-algorithm"
    }
  },
  "#5Chunk-layout": {
    "current": {
      "number": "5.3",
      "spec": "PNG",
      "text": "Chunk layout",
      "url": "https://w3c.github.io/png/#5Chunk-layout"
    },
    "snapshot": {
      "number": "5.3",
      "spec": "PNG",
      "text": "Chunk layout",
      "url": "https://www.w3.org/TR/png-3/#5Chunk-layout"
    }
  },
  "#5Chunk-naming-conventions": {
    "current": {
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      "spec": "PNG",
      "text": "Chunk naming conventions",
      "url": "https://w3c.github.io/png/#5Chunk-naming-conventions"
    },
    "snapshot": {
      "number": "5.4",
      "spec": "PNG",
      "text": "Chunk naming conventions",
      "url": "https://www.w3.org/TR/png-3/#5Chunk-naming-conventions"
    }
  },
  "#5ChunkOrdering": {
    "current": {
      "number": "5.6",
      "spec": "PNG",
      "text": "Chunk ordering",
      "url": "https://w3c.github.io/png/#5ChunkOrdering"
    },
    "snapshot": {
      "number": "5.6",
      "spec": "PNG",
      "text": "Chunk ordering",
      "url": "https://www.w3.org/TR/png-3/#5ChunkOrdering"
    }
  },
  "#5DataRep": {
    "current": {
      "number": "5",
      "spec": "PNG",
      "text": "Datastream structure",
      "url": "https://w3c.github.io/png/#5DataRep"
    },
    "snapshot": {
      "number": "5",
      "spec": "PNG",
      "text": "Datastream structure",
      "url": "https://www.w3.org/TR/png-3/#5DataRep"
    }
  },
  "#5Introduction": {
    "current": {
      "number": "5.1",
      "spec": "PNG",
      "text": "PNG datastream",
      "url": "https://w3c.github.io/png/#5Introduction"
    },
    "snapshot": {
      "number": "5.1",
      "spec": "PNG",
      "text": "PNG datastream",
      "url": "https://www.w3.org/TR/png-3/#5Introduction"
    }
  },
  "#5PNG-file-signature": {
    "current": {
      "number": "5.2",
      "spec": "PNG",
      "text": "PNG signature",
      "url": "https://w3c.github.io/png/#5PNG-file-signature"
    },
    "snapshot": {
      "number": "5.2",
      "spec": "PNG",
      "text": "PNG signature",
      "url": "https://www.w3.org/TR/png-3/#5PNG-file-signature"
    }
  },
  "#6AlphaRepresentation": {
    "current": {
      "number": "6.2",
      "spec": "PNG",
      "text": "Alpha representation",
      "url": "https://w3c.github.io/png/#6AlphaRepresentation"
    },
    "snapshot": {
      "number": "6.2",
      "spec": "PNG",
      "text": "Alpha representation",
      "url": "https://www.w3.org/TR/png-3/#6AlphaRepresentation"
    }
  },
  "#6Colour-values": {
    "current": {
      "number": "6.1",
      "spec": "PNG",
      "text": "Color types and values",
      "url": "https://w3c.github.io/png/#6Colour-values"
    },
    "snapshot": {
      "number": "6.1",
      "spec": "PNG",
      "text": "Color types and values",
      "url": "https://www.w3.org/TR/png-3/#6Colour-values"
    }
  },
  "#6Transformation": {
    "current": {
      "number": "6",
      "spec": "PNG",
      "text": "Reference image to PNG image transformation",
      "url": "https://w3c.github.io/png/#6Transformation"
    },
    "snapshot": {
      "number": "6",
      "spec": "PNG",
      "text": "Reference image to PNG image transformation",
      "url": "https://www.w3.org/TR/png-3/#6Transformation"
    }
  },
  "#7Filtering": {
    "current": {
      "number": "7.3",
      "spec": "PNG",
      "text": "Filtering",
      "url": "https://w3c.github.io/png/#7Filtering"
    },
    "snapshot": {
      "number": "7.3",
      "spec": "PNG",
      "text": "Filtering",
      "url": "https://www.w3.org/TR/png-3/#7Filtering"
    }
  },
  "#7Integers-and-byte-order": {
    "current": {
      "number": "7.1",
      "spec": "PNG",
      "text": "Integers and byte order",
      "url": "https://w3c.github.io/png/#7Integers-and-byte-order"
    },
    "snapshot": {
      "number": "7.1",
      "spec": "PNG",
      "text": "Integers and byte order",
      "url": "https://www.w3.org/TR/png-3/#7Integers-and-byte-order"
    }
  },
  "#7Scanline": {
    "current": {
      "number": "7.2",
      "spec": "PNG",
      "text": "Scanlines",
      "url": "https://w3c.github.io/png/#7Scanline"
    },
    "snapshot": {
      "number": "7.2",
      "spec": "PNG",
      "text": "Scanlines",
      "url": "https://www.w3.org/TR/png-3/#7Scanline"
    }
  },
  "#7Transformation": {
    "current": {
      "number": "7",
      "spec": "PNG",
      "text": "Encoding the PNG image as a PNG datastream",
      "url": "https://w3c.github.io/png/#7Transformation"
    },
    "snapshot": {
      "number": "7",
      "spec": "PNG",
      "text": "Encoding the PNG image as a PNG datastream",
      "url": "https://www.w3.org/TR/png-3/#7Transformation"
    }
  },
  "#8Interlace": {
    "current": {
      "number": "8",
      "spec": "PNG",
      "text": "Interlacing and pass extraction",
      "url": "https://w3c.github.io/png/#8Interlace"
    },
    "snapshot": {
      "number": "8",
      "spec": "PNG",
      "text": "Interlacing and pass extraction",
      "url": "https://www.w3.org/TR/png-3/#8Interlace"
    }
  },
  "#8InterlaceIntro": {
    "current": {
      "number": "",
      "spec": "PNG",
      "text": "Introduction",
      "url": "https://w3c.github.io/png/#8InterlaceIntro"
    },
    "snapshot": {
      "number": "",
      "spec": "PNG",
      "text": "Introduction",
      "url": "https://www.w3.org/TR/png-3/#8InterlaceIntro"
    }
  },
  "#8InterlaceMethods": {
    "current": {
      "number": "8.1",
      "spec": "PNG",
      "text": "Interlace methods",
      "url": "https://w3c.github.io/png/#8InterlaceMethods"
    },
    "snapshot": {
      "number": "8.1",
      "spec": "PNG",
      "text": "Interlace methods",
      "url": "https://www.w3.org/TR/png-3/#8InterlaceMethods"
    }
  },
  "#9Filter-type-3-Average": {
    "current": {
      "number": "9.3",
      "spec": "PNG",
      "text": "Filter type 3: Average",
      "url": "https://w3c.github.io/png/#9Filter-type-3-Average"
    },
    "snapshot": {
      "number": "9.3",
      "spec": "PNG",
      "text": "Filter type 3: Average",
      "url": "https://www.w3.org/TR/png-3/#9Filter-type-3-Average"
    }
  },
  "#9Filter-type-4-Paeth": {
    "current": {
      "number": "9.4",
      "spec": "PNG",
      "text": "Filter type 4: Paeth",
      "url": "https://w3c.github.io/png/#9Filter-type-4-Paeth"
    },
    "snapshot": {
      "number": "9.4",
      "spec": "PNG",
      "text": "Filter type 4: Paeth",
      "url": "https://www.w3.org/TR/png-3/#9Filter-type-4-Paeth"
    }
  },
  "#9Filter-types": {
    "current": {
      "number": "9.2",
      "spec": "PNG",
      "text": "Filter types for filter method 0",
      "url": "https://w3c.github.io/png/#9Filter-types"
    },
    "snapshot": {
      "number": "9.2",
      "spec": "PNG",
      "text": "Filter types for filter method 0",
      "url": "https://www.w3.org/TR/png-3/#9Filter-types"
    }
  },
  "#9Filters": {
    "current": {
      "number": "9",
      "spec": "PNG",
      "text": "Filtering",
      "url": "https://w3c.github.io/png/#9Filters"
    },
    "snapshot": {
      "number": "9",
      "spec": "PNG",
      "text": "Filtering",
      "url": "https://www.w3.org/TR/png-3/#9Filters"
    }
  },
  "#9FtIntro": {
    "current": {
      "number": "9.1",
      "spec": "PNG",
      "text": "Filter methods and filter types",
      "url": "https://w3c.github.io/png/#9FtIntro"
    },
    "snapshot": {
      "number": "9.1",
      "spec": "PNG",
      "text": "Filter methods and filter types",
      "url": "https://www.w3.org/TR/png-3/#9FtIntro"
    }
  },
  "#A-Conventions": {
    "current": {
      "number": "A",
      "spec": "PNG",
      "text": "Internet Media Types",
      "url": "https://w3c.github.io/png/#A-Conventions"
    },
    "snapshot": {
      "number": "A",
      "spec": "PNG",
      "text": "Internet Media Types",
      "url": "https://www.w3.org/TR/png-3/#A-Conventions"
    }
  },
  "#A-Media-type": {
    "current": {
      "number": "A.1",
      "spec": "PNG",
      "text": "image/png",
      "url": "https://w3c.github.io/png/#image-png"
    },
    "snapshot": {
      "number": "A.1",
      "spec": "PNG",
      "text": "image/png",
      "url": "https://www.w3.org/TR/png-3/#image-png"
    }
  },
  "#B-NewChunksAppendix": {
    "current": {
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      "spec": "PNG",
      "text": "Guidelines for private chunk types",
      "url": "https://w3c.github.io/png/#B-NewChunksAppendix"
    },
    "snapshot": {
      "number": "B",
      "spec": "PNG",
      "text": "Guidelines for private chunk types",
      "url": "https://www.w3.org/TR/png-3/#B-NewChunksAppendix"
    }
  },
  "#C-GammaAppendix": {
    "current": {
      "number": "C",
      "spec": "PNG",
      "text": "Gamma and chromaticity",
      "url": "https://w3c.github.io/png/#C-GammaAppendix"
    },
    "snapshot": {
      "number": "C",
      "spec": "PNG",
      "text": "Gamma and chromaticity",
      "url": "https://www.w3.org/TR/png-3/#C-GammaAppendix"
    }
  },
  "#D-CRCAppendix": {
    "current": {
      "number": "D",
      "spec": "PNG",
      "text": "Sample CRC implementation",
      "url": "https://w3c.github.io/png/#D-CRCAppendix"
    },
    "snapshot": {
      "number": "D",
      "spec": "PNG",
      "text": "Sample CRC implementation",
      "url": "https://www.w3.org/TR/png-3/#D-CRCAppendix"
    }
  },
  "#E-Intro": {
    "current": {
      "number": "",
      "spec": "PNG",
      "text": "Introduction",
      "url": "https://w3c.github.io/png/#E-Intro"
    },
    "snapshot": {
      "number": "",
      "spec": "PNG",
      "text": "Introduction",
      "url": "https://www.w3.org/TR/png-3/#E-Intro"
    }
  },
  "#E-PNG-home-page": {
    "current": {
      "number": "E.2",
      "spec": "PNG",
      "text": "PNG web site",
      "url": "https://w3c.github.io/png/#E-PNG-home-page"
    },
    "snapshot": {
      "number": "E.2",
      "spec": "PNG",
      "text": "PNG web site",
      "url": "https://www.w3.org/TR/png-3/#E-PNG-home-page"
    }
  },
  "#E-Resources": {
    "current": {
      "number": "E",
      "spec": "PNG",
      "text": "Online resources",
      "url": "https://w3c.github.io/png/#E-Resources"
    },
    "snapshot": {
      "number": "E",
      "spec": "PNG",
      "text": "Online resources",
      "url": "https://www.w3.org/TR/png-3/#E-Resources"
    }
  },
  "#E-Sample-implementation": {
    "current": {
      "number": "E.3",
      "spec": "PNG",
      "text": "Sample implementation and test images",
      "url": "https://w3c.github.io/png/#E-Sample-implementation"
    },
    "snapshot": {
      "number": "E.3",
      "spec": "PNG",
      "text": "Sample implementation and test images",
      "url": "https://www.w3.org/TR/png-3/#E-Sample-implementation"
    }
  },
  "#E-icc-profile-specs": {
    "current": {
      "number": "E.1",
      "spec": "PNG",
      "text": "ICC profile specifications",
      "url": "https://w3c.github.io/png/#E-icc-profile-specs"
    },
    "snapshot": {
      "number": "E.1",
      "spec": "PNG",
      "text": "ICC profile specifications",
      "url": "https://www.w3.org/TR/png-3/#E-icc-profile-specs"
    }
  },
  "#F-ChangeList": {
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      "spec": "PNG",
      "text": "Changes",
      "url": "https://w3c.github.io/png/#F-ChangeList"
    },
    "snapshot": {
      "number": "F",
      "spec": "PNG",
      "text": "Changes",
      "url": "https://www.w3.org/TR/png-3/#F-ChangeList"
    }
  },
  "#IANA-registrations": {
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      "number": "A",
      "spec": "PNG",
      "text": "Internet Media Types",
      "url": "https://w3c.github.io/png/#A-Conventions"
    },
    "snapshot": {
      "number": "A",
      "spec": "PNG",
      "text": "Internet Media Types",
      "url": "https://www.w3.org/TR/png-3/#A-Conventions"
    }
  },
  "#Introduction": {
    "current": {
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      "spec": "PNG",
      "text": "Introduction",
      "url": "https://w3c.github.io/png/#introduction"
    },
    "snapshot": {
      "number": "1",
      "spec": "PNG",
      "text": "Introduction",
      "url": "https://www.w3.org/TR/png-3/#introduction"
    }
  },
  "#Privacy-considerations": {
    "current": {
      "number": "13.4",
      "spec": "PNG",
      "text": "Privacy considerations",
      "url": "https://w3c.github.io/png/#Privacy-considerations"
    },
    "snapshot": {
      "number": "13.4",
      "spec": "PNG",
      "text": "Privacy considerations",
      "url": "https://www.w3.org/TR/png-3/#Privacy-considerations"
    }
  },
  "#a-2-image-apng": {
    "current": {
      "number": "A.2",
      "spec": "PNG",
      "text": "image/apng",
      "url": "https://w3c.github.io/png/#image-apng"
    },
    "snapshot": {
      "number": "A.2",
      "spec": "PNG",
      "text": "image/apng",
      "url": "https://www.w3.org/TR/png-3/#image-apng"
    }
  },
  "#acTL-chunk": {
    "current": {
      "number": "11.3.6.1",
      "spec": "PNG",
      "text": "acTL Animation Control Chunk",
      "url": "https://w3c.github.io/png/#acTL-chunk"
    },
    "snapshot": {
      "number": "11.3.6.1",
      "spec": "PNG",
      "text": "acTL Animation Control Chunk",
      "url": "https://www.w3.org/TR/png-3/#acTL-chunk"
    }
  },
  "#animation-information": {
    "current": {
      "number": "11.3.6",
      "spec": "PNG",
      "text": "Animation information",
      "url": "https://w3c.github.io/png/#animation-information"
    },
    "snapshot": {
      "number": "11.3.6",
      "spec": "PNG",
      "text": "Animation information",
      "url": "https://www.w3.org/TR/png-3/#animation-information"
    }
  },
  "#apng-canvas": {
    "current": {
      "number": "4.9.4",
      "spec": "PNG",
      "text": "Canvas",
      "url": "https://w3c.github.io/png/#apng-canvas"
    },
    "snapshot": {
      "number": "4.9.4",
      "spec": "PNG",
      "text": "Canvas",
      "url": "https://www.w3.org/TR/png-3/#apng-canvas"
    }
  },
  "#apng-frame-based-animation": {
    "current": {
      "number": "4.9",
      "spec": "PNG",
      "text": "APNG: frame-based animation",
      "url": "https://w3c.github.io/png/#apng-frame-based-animation"
    },
    "snapshot": {
      "number": "4.9",
      "spec": "PNG",
      "text": "APNG: frame-based animation",
      "url": "https://www.w3.org/TR/png-3/#apng-frame-based-animation"
    }
  },
  "#apng-output-buffer": {
    "current": {
      "number": "4.9.3",
      "spec": "PNG",
      "text": "Output buffer",
      "url": "https://w3c.github.io/png/#apng-output-buffer"
    },
    "snapshot": {
      "number": "4.9.3",
      "spec": "PNG",
      "text": "Output buffer",
      "url": "https://www.w3.org/TR/png-3/#apng-output-buffer"
    }
  },
  "#cICP-chunk": {
    "current": {
      "number": "11.3.2.6",
      "spec": "PNG",
      "text": "cICP Coding-independent code points for video signal type identification",
      "url": "https://w3c.github.io/png/#cICP-chunk"
    },
    "snapshot": {
      "number": "11.3.2.6",
      "spec": "PNG",
      "text": "cICP Coding-independent code points for video signal type identification",
      "url": "https://www.w3.org/TR/png-3/#cICP-chunk"
    }
  },
  "#cLLI-chunk": {
    "current": {
      "number": "11.3.2.8",
      "spec": "PNG",
      "text": "cLLI Content Light Level Information",
      "url": "https://w3c.github.io/png/#cLLI-chunk"
    },
    "snapshot": {
      "number": "11.3.2.8",
      "spec": "PNG",
      "text": "cLLI Content Light Level Information",
      "url": "https://www.w3.org/TR/png-3/#cLLI-chunk"
    }
  },
  "#caBX": {
    "current": {
      "number": "11.3.4.2",
      "spec": "PNG",
      "text": "caBX Content Credentials",
      "url": "https://w3c.github.io/png/#caBX"
    }
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    "snapshot": {
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      "url": "https://www.w3.org/TR/png-3/#normative-references"
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    "snapshot": {
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      "url": "https://www.w3.org/TR/png-3/#D-CRCAppendix"
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      "url": "https://www.w3.org/TR/png-3/#scope"
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      "url": "https://www.w3.org/TR/png-3/#sec-defining-new-chunks"
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  },
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    "snapshot": {
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      "url": "https://www.w3.org/TR/png-3/#sec-defining-public-chunks-general"
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    "snapshot": {
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      "url": "https://www.w3.org/TR/png-3/#sec-field-value-extensibility"
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    "snapshot": {
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  },
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    "snapshot": {
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      "text": "Static and Animated images",
      "url": "https://www.w3.org/TR/png-3/#static-and-animated-images"
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  },
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      "url": "https://w3c.github.io/png/#structure"
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    "snapshot": {
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  "#title": {
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    "snapshot": {
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    "snapshot": {
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    "snapshot": {
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    "snapshot": {
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    "snapshot": {
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    "snapshot": {
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    "snapshot": {
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    "snapshot": {
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    "snapshot": {
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    "snapshot": {
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    "snapshot": {
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      "number": "11.3.4.5",
      "spec": "PNG",
      "text": "eXIf Exchangeable Image File (Exif) Profile",
      "url": "https://www.w3.org/TR/png-3/#eXIf"
    }
  },
  "#x11-3-4-5-splt-suggested-palette": {
    "current": {
      "number": "11.3.4.5",
      "spec": "PNG",
      "text": "sPLT Suggested palette",
      "url": "https://w3c.github.io/png/#11sPLT"
    }
  },
  "#x11-3-4-6-1-exif-general-recommendations": {
    "current": {
      "number": "11.3.4.6.1",
      "spec": "PNG",
      "text": "eXIf General Recommendations",
      "url": "https://w3c.github.io/png/#exif-general-recommendations"
    }
  },
  "#x11-3-4-6-2-exif-recommendations-for-decoders": {
    "current": {
      "number": "11.3.4.6.2",
      "spec": "PNG",
      "text": "eXIf Recommendations for Decoders",
      "url": "https://w3c.github.io/png/#exif-recommendations-for-decoders"
    }
  },
  "#x11-3-4-6-3-exif-recommendations-for-encoders": {
    "current": {
      "number": "11.3.4.6.3",
      "spec": "PNG",
      "text": "eXIf Recommendations for Encoders",
      "url": "https://w3c.github.io/png/#exif-recommendations-for-encoders"
    }
  },
  "#x11-3-4-6-exif-exchangeable-image-file-exif-profile": {
    "current": {
      "number": "11.3.4.6",
      "spec": "PNG",
      "text": "eXIf Exchangeable Image File (Exif) Profile",
      "url": "https://w3c.github.io/png/#eXIf"
    }
  },
  "#x11-3-4-miscellaneous-information": {
    "current": {
      "number": "11.3.4",
      "spec": "PNG",
      "text": "Miscellaneous information",
      "url": "https://w3c.github.io/png/#11addnlsiinfo"
    },
    "snapshot": {
      "number": "11.3.4",
      "spec": "PNG",
      "text": "Miscellaneous information",
      "url": "https://www.w3.org/TR/png-3/#11addnlsiinfo"
    }
  },
  "#x11-3-5-1-time-image-last-modification-time": {
    "current": {
      "number": "11.3.5.1",
      "spec": "PNG",
      "text": "tIME Image last-modification time",
      "url": "https://w3c.github.io/png/#11tIME"
    },
    "snapshot": {
      "number": "11.3.5.1",
      "spec": "PNG",
      "text": "tIME Image last-modification time",
      "url": "https://www.w3.org/TR/png-3/#11tIME"
    }
  },
  "#x11-3-5-time-stamp-information": {
    "current": {
      "number": "11.3.5",
      "spec": "PNG",
      "text": "Time stamp information",
      "url": "https://w3c.github.io/png/#11timestampinfo"
    },
    "snapshot": {
      "number": "11.3.5",
      "spec": "PNG",
      "text": "Time stamp information",
      "url": "https://www.w3.org/TR/png-3/#11timestampinfo"
    }
  },
  "#x11-3-6-1-actl-animation-control-chunk": {
    "current": {
      "number": "11.3.6.1",
      "spec": "PNG",
      "text": "acTL Animation Control Chunk",
      "url": "https://w3c.github.io/png/#acTL-chunk"
    },
    "snapshot": {
      "number": "11.3.6.1",
      "spec": "PNG",
      "text": "acTL Animation Control Chunk",
      "url": "https://www.w3.org/TR/png-3/#acTL-chunk"
    }
  },
  "#x11-3-6-2-fctl-frame-control-chunk": {
    "current": {
      "number": "11.3.6.2",
      "spec": "PNG",
      "text": "fcTL Frame Control Chunk",
      "url": "https://w3c.github.io/png/#fcTL-chunk"
    },
    "snapshot": {
      "number": "11.3.6.2",
      "spec": "PNG",
      "text": "fcTL Frame Control Chunk",
      "url": "https://www.w3.org/TR/png-3/#fcTL-chunk"
    }
  },
  "#x11-3-6-3-fdat-frame-data-chunk": {
    "current": {
      "number": "11.3.6.3",
      "spec": "PNG",
      "text": "fdAT Frame Data Chunk",
      "url": "https://w3c.github.io/png/#fdAT-chunk"
    },
    "snapshot": {
      "number": "11.3.6.3",
      "spec": "PNG",
      "text": "fdAT Frame Data Chunk",
      "url": "https://www.w3.org/TR/png-3/#fdAT-chunk"
    }
  },
  "#x11-3-6-animation-information": {
    "current": {
      "number": "11.3.6",
      "spec": "PNG",
      "text": "Animation information",
      "url": "https://w3c.github.io/png/#animation-information"
    },
    "snapshot": {
      "number": "11.3.6",
      "spec": "PNG",
      "text": "Animation information",
      "url": "https://www.w3.org/TR/png-3/#animation-information"
    }
  },
  "#x11-3-ancillary-chunks": {
    "current": {
      "number": "11.3",
      "spec": "PNG",
      "text": "Ancillary chunks",
      "url": "https://w3c.github.io/png/#11Ancillary-chunks"
    },
    "snapshot": {
      "number": "11.3",
      "spec": "PNG",
      "text": "Ancillary chunks",
      "url": "https://www.w3.org/TR/png-3/#11Ancillary-chunks"
    }
  },
  "#x11-chunk-specifications": {
    "current": {
      "number": "",
      "spec": "PNG",
      "text": "11. Chunk specifications",
      "url": "https://w3c.github.io/png/#11Chunks"
    },
    "snapshot": {
      "number": "",
      "spec": "PNG",
      "text": "11. Chunk specifications",
      "url": "https://www.w3.org/TR/png-3/#11Chunks"
    }
  },
  "#x12-1-encoder-gamma-handling": {
    "current": {
      "number": "12.1",
      "spec": "PNG",
      "text": "Encoder gamma handling",
      "url": "https://w3c.github.io/png/#12Encoder-gamma-handling"
    },
    "snapshot": {
      "number": "12.1",
      "spec": "PNG",
      "text": "Encoder gamma handling",
      "url": "https://www.w3.org/TR/png-3/#12Encoder-gamma-handling"
    }
  },
  "#x12-10-1-use-of-private-chunks": {
    "current": {
      "number": "12.10.1",
      "spec": "PNG",
      "text": "Use of private chunks",
      "url": "https://w3c.github.io/png/#12Use-of-private-chunks"
    },
    "snapshot": {
      "number": "12.10.1",
      "spec": "PNG",
      "text": "Use of private chunks",
      "url": "https://www.w3.org/TR/png-3/#12Use-of-private-chunks"
    }
  },
  "#x12-10-2-use-of-non-reserved-field-values": {
    "current": {
      "number": "12.10.2",
      "spec": "PNG",
      "text": "Use of non-reserved field values",
      "url": "https://w3c.github.io/png/#12Private-type-and-method-codes"
    },
    "snapshot": {
      "number": "12.10.2",
      "spec": "PNG",
      "text": "Use of non-reserved field values",
      "url": "https://www.w3.org/TR/png-3/#12Private-type-and-method-codes"
    }
  },
  "#x12-10-3-ancillary-chunks": {
    "current": {
      "number": "12.10.3",
      "spec": "PNG",
      "text": "Ancillary chunks",
      "url": "https://w3c.github.io/png/#12Ancillary"
    },
    "snapshot": {
      "number": "12.10.3",
      "spec": "PNG",
      "text": "Ancillary chunks",
      "url": "https://www.w3.org/TR/png-3/#12Ancillary"
    }
  },
  "#x12-10-chunking": {
    "current": {
      "number": "12.10",
      "spec": "PNG",
      "text": "Chunking",
      "url": "https://w3c.github.io/png/#12Chunk-processing"
    },
    "snapshot": {
      "number": "12.10",
      "spec": "PNG",
      "text": "Chunking",
      "url": "https://www.w3.org/TR/png-3/#12Chunk-processing"
    }
  },
  "#x12-2-encoder-color-handling": {
    "current": {
      "number": "12.2",
      "spec": "PNG",
      "text": "Encoder color handling",
      "url": "https://w3c.github.io/png/#12Encoder-colour-handling"
    },
    "snapshot": {
      "number": "12.2",
      "spec": "PNG",
      "text": "Encoder color handling",
      "url": "https://www.w3.org/TR/png-3/#12Encoder-colour-handling"
    }
  },
  "#x12-3-alpha-channel-creation": {
    "current": {
      "number": "12.3",
      "spec": "PNG",
      "text": "Alpha channel creation",
      "url": "https://w3c.github.io/png/#12Alpha-channel-creation"
    },
    "snapshot": {
      "number": "12.3",
      "spec": "PNG",
      "text": "Alpha channel creation",
      "url": "https://www.w3.org/TR/png-3/#12Alpha-channel-creation"
    }
  },
  "#x12-4-sample-depth-scaling": {
    "current": {
      "number": "12.4",
      "spec": "PNG",
      "text": "Sample depth scaling",
      "url": "https://w3c.github.io/png/#12Sample-depth-scaling"
    },
    "snapshot": {
      "number": "12.4",
      "spec": "PNG",
      "text": "Sample depth scaling",
      "url": "https://www.w3.org/TR/png-3/#12Sample-depth-scaling"
    }
  },
  "#x12-5-suggested-palettes": {
    "current": {
      "number": "12.5",
      "spec": "PNG",
      "text": "Suggested palettes",
      "url": "https://w3c.github.io/png/#12Suggested-palettes"
    },
    "snapshot": {
      "number": "12.5",
      "spec": "PNG",
      "text": "Suggested palettes",
      "url": "https://www.w3.org/TR/png-3/#12Suggested-palettes"
    }
  },
  "#x12-6-interlacing": {
    "current": {
      "number": "12.6",
      "spec": "PNG",
      "text": "Interlacing",
      "url": "https://w3c.github.io/png/#12Interlacing"
    },
    "snapshot": {
      "number": "12.6",
      "spec": "PNG",
      "text": "Interlacing",
      "url": "https://www.w3.org/TR/png-3/#12Interlacing"
    }
  },
  "#x12-7-filter-selection": {
    "current": {
      "number": "12.7",
      "spec": "PNG",
      "text": "Filter selection",
      "url": "https://w3c.github.io/png/#12Filter-selection"
    },
    "snapshot": {
      "number": "12.7",
      "spec": "PNG",
      "text": "Filter selection",
      "url": "https://www.w3.org/TR/png-3/#12Filter-selection"
    }
  },
  "#x12-8-compression": {
    "current": {
      "number": "12.8",
      "spec": "PNG",
      "text": "Compression",
      "url": "https://w3c.github.io/png/#12Compression"
    },
    "snapshot": {
      "number": "12.8",
      "spec": "PNG",
      "text": "Compression",
      "url": "https://www.w3.org/TR/png-3/#12Compression"
    }
  },
  "#x12-9-text-chunk-processing": {
    "current": {
      "number": "12.9",
      "spec": "PNG",
      "text": "Text chunk processing",
      "url": "https://w3c.github.io/png/#12Text-chunk-processing"
    },
    "snapshot": {
      "number": "12.9",
      "spec": "PNG",
      "text": "Text chunk processing",
      "url": "https://www.w3.org/TR/png-3/#12Text-chunk-processing"
    }
  },
  "#x12-png-encoders": {
    "current": {
      "number": "",
      "spec": "PNG",
      "text": "12. PNG Encoders",
      "url": "https://w3c.github.io/png/#12Encoders"
    },
    "snapshot": {
      "number": "",
      "spec": "PNG",
      "text": "12. PNG Encoders",
      "url": "https://www.w3.org/TR/png-3/#12Encoders"
    }
  },
  "#x13-10-interlacing-and-progressive-display": {
    "current": {
      "number": "13.10",
      "spec": "PNG",
      "text": "Interlacing and progressive display",
      "url": "https://w3c.github.io/png/#13Progressive-display"
    },
    "snapshot": {
      "number": "13.10",
      "spec": "PNG",
      "text": "Interlacing and progressive display",
      "url": "https://www.w3.org/TR/png-3/#13Progressive-display"
    }
  },
  "#x13-11-truecolor-image-handling": {
    "current": {
      "number": "13.11",
      "spec": "PNG",
      "text": "Truecolor image handling",
      "url": "https://w3c.github.io/png/#13Truecolour-image-handling"
    },
    "snapshot": {
      "number": "13.11",
      "spec": "PNG",
      "text": "Truecolor image handling",
      "url": "https://www.w3.org/TR/png-3/#13Truecolour-image-handling"
    }
  },
  "#x13-12-sample-depth-rescaling": {
    "current": {
      "number": "13.12",
      "spec": "PNG",
      "text": "Sample depth rescaling",
      "url": "https://w3c.github.io/png/#13Sample-depth-rescaling"
    },
    "snapshot": {
      "number": "13.12",
      "spec": "PNG",
      "text": "Sample depth rescaling",
      "url": "https://www.w3.org/TR/png-3/#13Sample-depth-rescaling"
    }
  },
  "#x13-13-decoder-gamma-handling": {
    "current": {
      "number": "13.13",
      "spec": "PNG",
      "text": "Decoder gamma handling",
      "url": "https://w3c.github.io/png/#13Decoder-gamma-handling"
    },
    "snapshot": {
      "number": "13.13",
      "spec": "PNG",
      "text": "Decoder gamma handling",
      "url": "https://www.w3.org/TR/png-3/#13Decoder-gamma-handling"
    }
  },
  "#x13-14-decoder-color-handling": {
    "current": {
      "number": "13.14",
      "spec": "PNG",
      "text": "Decoder color handling",
      "url": "https://w3c.github.io/png/#13Decoder-colour-handling"
    },
    "snapshot": {
      "number": "13.14",
      "spec": "PNG",
      "text": "Decoder color handling",
      "url": "https://www.w3.org/TR/png-3/#13Decoder-colour-handling"
    }
  },
  "#x13-15-background-color": {
    "current": {
      "number": "13.15",
      "spec": "PNG",
      "text": "Background color",
      "url": "https://w3c.github.io/png/#13Background-colour"
    },
    "snapshot": {
      "number": "13.15",
      "spec": "PNG",
      "text": "Background color",
      "url": "https://www.w3.org/TR/png-3/#13Background-colour"
    }
  },
  "#x13-16-alpha-channel-processing": {
    "current": {
      "number": "13.16",
      "spec": "PNG",
      "text": "Alpha channel processing",
      "url": "https://w3c.github.io/png/#13Alpha-channel-processing"
    },
    "snapshot": {
      "number": "13.16",
      "spec": "PNG",
      "text": "Alpha channel processing",
      "url": "https://www.w3.org/TR/png-3/#13Alpha-channel-processing"
    }
  },
  "#x13-17-histogram-and-suggested-palette-usage": {
    "current": {
      "number": "13.17",
      "spec": "PNG",
      "text": "Histogram and suggested palette usage",
      "url": "https://w3c.github.io/png/#13Histogram-and-suggested-palette-usage"
    },
    "snapshot": {
      "number": "13.17",
      "spec": "PNG",
      "text": "Histogram and suggested palette usage",
      "url": "https://www.w3.org/TR/png-3/#13Histogram-and-suggested-palette-usage"
    }
  },
  "#x13-2-error-checking": {
    "current": {
      "number": "13.2",
      "spec": "PNG",
      "text": "Error checking",
      "url": "https://w3c.github.io/png/#13Error-checking"
    },
    "snapshot": {
      "number": "13.2",
      "spec": "PNG",
      "text": "Error checking",
      "url": "https://www.w3.org/TR/png-3/#13Error-checking"
    }
  },
  "#x13-3-security-considerations": {
    "current": {
      "number": "13.3",
      "spec": "PNG",
      "text": "Security considerations",
      "url": "https://w3c.github.io/png/#13Security-considerations"
    },
    "snapshot": {
      "number": "13.3",
      "spec": "PNG",
      "text": "Security considerations",
      "url": "https://www.w3.org/TR/png-3/#13Security-considerations"
    }
  },
  "#x13-4-privacy-considerations": {
    "current": {
      "number": "13.4",
      "spec": "PNG",
      "text": "Privacy considerations",
      "url": "https://w3c.github.io/png/#Privacy-considerations"
    },
    "snapshot": {
      "number": "13.4",
      "spec": "PNG",
      "text": "Privacy considerations",
      "url": "https://www.w3.org/TR/png-3/#Privacy-considerations"
    }
  },
  "#x13-5-chunking": {
    "current": {
      "number": "13.5",
      "spec": "PNG",
      "text": "Chunking",
      "url": "https://w3c.github.io/png/#13Chunking"
    },
    "snapshot": {
      "number": "13.5",
      "spec": "PNG",
      "text": "Chunking",
      "url": "https://www.w3.org/TR/png-3/#13Chunking"
    }
  },
  "#x13-6-pixel-dimensions": {
    "current": {
      "number": "13.6",
      "spec": "PNG",
      "text": "Pixel dimensions",
      "url": "https://w3c.github.io/png/#13Pixel-dimensions"
    },
    "snapshot": {
      "number": "13.6",
      "spec": "PNG",
      "text": "Pixel dimensions",
      "url": "https://www.w3.org/TR/png-3/#13Pixel-dimensions"
    }
  },
  "#x13-7-text-chunk-processing": {
    "current": {
      "number": "13.7",
      "spec": "PNG",
      "text": "Text chunk processing",
      "url": "https://w3c.github.io/png/#13Text-chunk-processing"
    },
    "snapshot": {
      "number": "13.7",
      "spec": "PNG",
      "text": "Text chunk processing",
      "url": "https://www.w3.org/TR/png-3/#13Text-chunk-processing"
    }
  },
  "#x13-8-decompression": {
    "current": {
      "number": "13.8",
      "spec": "PNG",
      "text": "Decompression",
      "url": "https://w3c.github.io/png/#13Decompression"
    },
    "snapshot": {
      "number": "13.8",
      "spec": "PNG",
      "text": "Decompression",
      "url": "https://www.w3.org/TR/png-3/#13Decompression"
    }
  },
  "#x13-9-filtering": {
    "current": {
      "number": "13.9",
      "spec": "PNG",
      "text": "Filtering",
      "url": "https://w3c.github.io/png/#13Filtering"
    },
    "snapshot": {
      "number": "13.9",
      "spec": "PNG",
      "text": "Filtering",
      "url": "https://www.w3.org/TR/png-3/#13Filtering"
    }
  },
  "#x13-png-decoders-and-viewers": {
    "current": {
      "number": "",
      "spec": "PNG",
      "text": "13. PNG decoders and viewers",
      "url": "https://w3c.github.io/png/#13Decoders"
    },
    "snapshot": {
      "number": "",
      "spec": "PNG",
      "text": "13. PNG decoders and viewers",
      "url": "https://www.w3.org/TR/png-3/#13Decoders"
    }
  },
  "#x14-1-additional-chunk-types": {
    "current": {
      "number": "14.1",
      "spec": "PNG",
      "text": "Additional chunk types",
      "url": "https://w3c.github.io/png/#14Additional-chunk-types"
    },
    "snapshot": {
      "number": "14.1",
      "spec": "PNG",
      "text": "Additional chunk types",
      "url": "https://www.w3.org/TR/png-3/#14Additional-chunk-types"
    }
  },
  "#x14-2-behavior-of-png-editors": {
    "current": {
      "number": "14.2",
      "spec": "PNG",
      "text": "Behavior of PNG editors",
      "url": "https://w3c.github.io/png/#14Ordering"
    },
    "snapshot": {
      "number": "14.2",
      "spec": "PNG",
      "text": "Behavior of PNG editors",
      "url": "https://www.w3.org/TR/png-3/#14Ordering"
    }
  },
  "#x14-3-1-ordering-of-critical-chunks": {
    "current": {
      "number": "14.3.1",
      "spec": "PNG",
      "text": "Ordering of critical chunks",
      "url": "https://w3c.github.io/png/#14Ordering-of-critical-chunks"
    },
    "snapshot": {
      "number": "14.3.1",
      "spec": "PNG",
      "text": "Ordering of critical chunks",
      "url": "https://www.w3.org/TR/png-3/#14Ordering-of-critical-chunks"
    }
  },
  "#x14-3-2-ordering-of-ancillary-chunks": {
    "current": {
      "number": "14.3.2",
      "spec": "PNG",
      "text": "Ordering of ancillary chunks",
      "url": "https://w3c.github.io/png/#14Ordering-of-ancillary-chunks"
    },
    "snapshot": {
      "number": "14.3.2",
      "spec": "PNG",
      "text": "Ordering of ancillary chunks",
      "url": "https://www.w3.org/TR/png-3/#14Ordering-of-ancillary-chunks"
    }
  },
  "#x14-3-ordering-of-chunks": {
    "current": {
      "number": "14.3",
      "spec": "PNG",
      "text": "Ordering of chunks",
      "url": "https://w3c.github.io/png/#14Ordering-of-chunks"
    },
    "snapshot": {
      "number": "14.3",
      "spec": "PNG",
      "text": "Ordering of chunks",
      "url": "https://www.w3.org/TR/png-3/#14Ordering-of-chunks"
    }
  },
  "#x14-editors": {
    "current": {
      "number": "",
      "spec": "PNG",
      "text": "14. Editors",
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    "snapshot": {
      "number": "",
      "spec": "PNG",
      "text": "14. Editors",
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      "url": "https://w3c.github.io/png/#15ConfObjectives"
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      "url": "https://www.w3.org/TR/png-3/#15ConfObjectives"
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    "snapshot": {
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      "url": "https://w3c.github.io/png/#6AlphaRepresentation"
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    "snapshot": {
      "number": "6.2",
      "spec": "PNG",
      "text": "Alpha representation",
      "url": "https://www.w3.org/TR/png-3/#6AlphaRepresentation"
    }
  },
  "#x6-reference-image-to-png-image-transformation": {
    "current": {
      "number": "6",
      "spec": "PNG",
      "text": "Reference image to PNG image transformation",
      "url": "https://w3c.github.io/png/#6Transformation"
    },
    "snapshot": {
      "number": "6",
      "spec": "PNG",
      "text": "Reference image to PNG image transformation",
      "url": "https://www.w3.org/TR/png-3/#6Transformation"
    }
  },
  "#x7-1-integers-and-byte-order": {
    "current": {
      "number": "7.1",
      "spec": "PNG",
      "text": "Integers and byte order",
      "url": "https://w3c.github.io/png/#7Integers-and-byte-order"
    },
    "snapshot": {
      "number": "7.1",
      "spec": "PNG",
      "text": "Integers and byte order",
      "url": "https://www.w3.org/TR/png-3/#7Integers-and-byte-order"
    }
  },
  "#x7-2-scanlines": {
    "current": {
      "number": "7.2",
      "spec": "PNG",
      "text": "Scanlines",
      "url": "https://w3c.github.io/png/#7Scanline"
    },
    "snapshot": {
      "number": "7.2",
      "spec": "PNG",
      "text": "Scanlines",
      "url": "https://www.w3.org/TR/png-3/#7Scanline"
    }
  },
  "#x7-3-filtering": {
    "current": {
      "number": "7.3",
      "spec": "PNG",
      "text": "Filtering",
      "url": "https://w3c.github.io/png/#7Filtering"
    },
    "snapshot": {
      "number": "7.3",
      "spec": "PNG",
      "text": "Filtering",
      "url": "https://www.w3.org/TR/png-3/#7Filtering"
    }
  },
  "#x7-encoding-the-png-image-as-a-png-datastream": {
    "current": {
      "number": "7",
      "spec": "PNG",
      "text": "Encoding the PNG image as a PNG datastream",
      "url": "https://w3c.github.io/png/#7Transformation"
    },
    "snapshot": {
      "number": "7",
      "spec": "PNG",
      "text": "Encoding the PNG image as a PNG datastream",
      "url": "https://www.w3.org/TR/png-3/#7Transformation"
    }
  },
  "#x8-1-interlace-methods": {
    "current": {
      "number": "8.1",
      "spec": "PNG",
      "text": "Interlace methods",
      "url": "https://w3c.github.io/png/#8InterlaceMethods"
    },
    "snapshot": {
      "number": "8.1",
      "spec": "PNG",
      "text": "Interlace methods",
      "url": "https://www.w3.org/TR/png-3/#8InterlaceMethods"
    }
  },
  "#x8-interlacing-and-pass-extraction": {
    "current": {
      "number": "8",
      "spec": "PNG",
      "text": "Interlacing and pass extraction",
      "url": "https://w3c.github.io/png/#8Interlace"
    },
    "snapshot": {
      "number": "8",
      "spec": "PNG",
      "text": "Interlacing and pass extraction",
      "url": "https://www.w3.org/TR/png-3/#8Interlace"
    }
  },
  "#x9-1-filter-methods-and-filter-types": {
    "current": {
      "number": "9.1",
      "spec": "PNG",
      "text": "Filter methods and filter types",
      "url": "https://w3c.github.io/png/#9FtIntro"
    },
    "snapshot": {
      "number": "9.1",
      "spec": "PNG",
      "text": "Filter methods and filter types",
      "url": "https://www.w3.org/TR/png-3/#9FtIntro"
    }
  },
  "#x9-2-filter-types-for-filter-method-0": {
    "current": {
      "number": "9.2",
      "spec": "PNG",
      "text": "Filter types for filter method 0",
      "url": "https://w3c.github.io/png/#9Filter-types"
    },
    "snapshot": {
      "number": "9.2",
      "spec": "PNG",
      "text": "Filter types for filter method 0",
      "url": "https://www.w3.org/TR/png-3/#9Filter-types"
    }
  },
  "#x9-3-filter-type-3-average": {
    "current": {
      "number": "9.3",
      "spec": "PNG",
      "text": "Filter type 3: Average",
      "url": "https://w3c.github.io/png/#9Filter-type-3-Average"
    },
    "snapshot": {
      "number": "9.3",
      "spec": "PNG",
      "text": "Filter type 3: Average",
      "url": "https://www.w3.org/TR/png-3/#9Filter-type-3-Average"
    }
  },
  "#x9-4-filter-type-4-paeth": {
    "current": {
      "number": "9.4",
      "spec": "PNG",
      "text": "Filter type 4: Paeth",
      "url": "https://w3c.github.io/png/#9Filter-type-4-Paeth"
    },
    "snapshot": {
      "number": "9.4",
      "spec": "PNG",
      "text": "Filter type 4: Paeth",
      "url": "https://www.w3.org/TR/png-3/#9Filter-type-4-Paeth"
    }
  },
  "#x9-filtering": {
    "current": {
      "number": "9",
      "spec": "PNG",
      "text": "Filtering",
      "url": "https://w3c.github.io/png/#9Filters"
    },
    "snapshot": {
      "number": "9",
      "spec": "PNG",
      "text": "Filtering",
      "url": "https://www.w3.org/TR/png-3/#9Filters"
    }
  }
}