标准（插件中立）元数据格式规范
插件中性“javax_imageio_1.0”格式由一个名为“javax_imageio_1.0”的根节点组成，该节点具有子节点“chroma”、“compression”、“dimension”、“document”、“text”、“tile”、和“透明度”。该格式由以下 DTD 描述：
<!DOCTYPE "javax_imageio_1.0" [
<!ELEMENT "javax_imageio_1.0" (Chroma?, Compression?, Data?, Dimension?,
Document?, Text?, Transparency?)>
<!ELEMENT "Chroma" (ColorSpaceType?, NumChannels?, Gamma?,
BlackIsZero?, Palette?, BackgroundIndex?, BackgroundColor?)>
<!-- Chroma (color) information -->
<!ELEMENT "ColorSpaceType" EMPTY>
<!-- The raw color space of the image -->
<!ATTLIST "ColorSpaceType" "name" ("XYZ" | "Lab" | "Luv" |
"YCbCr" | "Yxy" | "YCCK" | "PhotoYCC" | "RGB" | "GRAY" | "HSV" |
"HLS" | "CMYK" | "CMY" | "2CLR" | "3CLR" | "4CLR" | "5CLR" |
"6CLR" | "7CLR" | "8CLR" | "9CLR" | "ACLR" | "BCLR" | "CCLR" |
"DCLR" | "ECLR" | "FCLR") #REQUIRED>
<!ELEMENT "NumChannels" EMPTY>
<!-- The number of channels in the raw image, including alpha -->
<!ATTLIST "NumChannels" "value" #CDATA #REQUIRED>
<!-- Data type: List of Integer -->
<!ELEMENT "Gamma" EMPTY>
<!-- The image gamma -->
<!ATTLIST "Gamma" "value" #CDATA #REQUIRED>
<!-- Data type: Float -->
<!ELEMENT "BlackIsZero" EMPTY>
<!-- True if smaller values represent darker shades -->
<!ATTLIST "BlackIsZero" "value" ("TRUE" | "FALSE") "TRUE">
<!ELEMENT "Palette" (PaletteEntry)*>
<!-- Palette-color information -->
<!ELEMENT "PaletteEntry" EMPTY>
<!-- A palette entry -->
<!ATTLIST "PaletteEntry" "index" #CDATA #REQUIRED>
<!-- The index of the palette entry -->
<!-- Data type: Integer -->
<!ATTLIST "PaletteEntry" "red" #CDATA #REQUIRED>
<!-- The red value for the palette entry -->
<!-- Data type: Integer -->
<!ATTLIST "PaletteEntry" "green" #CDATA #REQUIRED>
<!-- The green value for the palette entry -->
<!-- Data type: Integer -->
<!ATTLIST "PaletteEntry" "blue" #CDATA #REQUIRED>
<!-- The blue value for the palette entry -->
<!-- Data type: Integer -->
<!ATTLIST "PaletteEntry" "alpha" #CDATA "255">
<!-- The alpha value for the palette entry -->
<!-- Data type: Integer -->
<!ELEMENT "BackgroundIndex" EMPTY>
<!-- A palette index to be used as a background -->
<!ATTLIST "BackgroundIndex" "value" #CDATA #REQUIRED>
<!-- Data type: Integer -->
<!ELEMENT "BackgroundColor" EMPTY>
<!-- An RGB triple to be used as a background -->
<!ATTLIST "BackgroundColor" "red" #CDATA #REQUIRED>
<!-- The red background value -->
<!-- Data type: Integer -->
<!ATTLIST "BackgroundColor" "green" #CDATA #REQUIRED>
<!-- The green background value -->
<!-- Data type: Integer -->
<!ATTLIST "BackgroundColor" "blue" #CDATA #REQUIRED>
<!-- The blue background value -->
<!-- Data type: Integer -->
<!ELEMENT "Compression" (CompressionTypeName?, Lossless?,
NumProgressiveScans?, BitRate?)>
<!-- Compression information -->
<!ELEMENT "CompressionTypeName" EMPTY>
<!-- The name of the compression scheme in use -->
<!ATTLIST "CompressionTypeName" "value" #CDATA #REQUIRED>
<!-- Data type: String -->
<!ELEMENT "Lossless" EMPTY>
<!-- True if the compression scheme is lossless -->
<!ATTLIST "Lossless" "value" ("TRUE" | "FALSE") "TRUE">
<!ELEMENT "NumProgressiveScans" EMPTY>
<!-- The number of progressive scans used in the image encoding -->
<!ATTLIST "NumProgressiveScans" "value" #CDATA #REQUIRED>
<!-- Data type: Integer -->
<!ELEMENT "BitRate" EMPTY>
<!-- The estimated bit rate of the compression scheme -->
<!ATTLIST "BitRate" "value" #CDATA #REQUIRED>
<!-- Data type: Float -->
<!ELEMENT "Data" (PlanarConfiguration?, SampleFormat?, BitsPerSample?,
SignificantBitsPerSample?, SampleMSB?)>
<!-- Information on the image layout -->
<!ELEMENT "PlanarConfiguration" EMPTY>
<!-- The organization of image samples in the stream -->
<!ATTLIST "PlanarConfiguration" "value" ("PixelInterleaved" |
"PlaneInterleaved" | "LineInterleaved" | "TileInterleaved")
#REQUIRED>
<!ELEMENT "SampleFormat" EMPTY>
<!-- The numeric format of image samples -->
<!ATTLIST "SampleFormat" "value" ("SignedIntegral" |
"UnsignedIntegral" | "Real" | "Index") #REQUIRED>
<!ELEMENT "BitsPerSample" EMPTY>
<!-- The number of bits per sample -->
<!ATTLIST "BitsPerSample" "value" #CDATA #REQUIRED>
<!-- A list of integers, one per channel -->
<!-- Data type: List of Integer -->
<!-- Min length: 1 -->
<!ELEMENT "SignificantBitsPerSample" EMPTY>
<!-- The number of significant bits per sample -->
<!ATTLIST "SignificantBitsPerSample" "value" #CDATA #REQUIRED>
<!-- A list of integers, one per channel -->
<!-- Data type: List of Integer -->
<!-- Min length: 1 -->
<!ELEMENT "SampleMSB" EMPTY>
<!-- The position of the most significant bit of each sample -->
<!ATTLIST "SampleMSB" "value" #CDATA #REQUIRED>
<!-- A list of integers, one per channel -->
<!-- Data type: List of Integer -->
<!-- Min length: 1 -->
<!ELEMENT "Dimension" (PixelAspectRatio?, ImageOrientation?,
HorizontalPixelSize?, VerticalPixelSize?,
HorizontalPhysicalPixelSpacing?, VerticalPhysicalPixelSpacing?,
HorizontalPosition?, VerticalPosition?, HorizontalPixelOffset?,
VerticalPixelOffset?, HorizontalScreenSize?, VerticalScreenSize?)>
<!-- Dimension information -->
<!ELEMENT "PixelAspectRatio" EMPTY>
<!-- The width of a pixel divided by its height -->
<!ATTLIST "PixelAspectRatio" "value" #CDATA #REQUIRED>
<!-- Data type: Float -->
<!ELEMENT "ImageOrientation" EMPTY>
<!-- The desired orientation of the image in terms of flips and
counter-clockwise rotations -->
<!ATTLIST "ImageOrientation" "value" ("Normal" | "Rotate90" |
"Rotate180" | "Rotate270" | "FlipH" | "FlipV" |
"FlipHRotate90" | "FlipVRotate90") #REQUIRED>
<!ELEMENT "HorizontalPixelSize" EMPTY>
<!-- The width of a pixel, in millimeters, as it should be rendered
on media -->
<!ATTLIST "HorizontalPixelSize" "value" #CDATA #REQUIRED>
<!-- Data type: Float -->
<!ELEMENT "VerticalPixelSize" EMPTY>
<!-- The height of a pixel, in millimeters, as it should be
rendered on media -->
<!ATTLIST "VerticalPixelSize" "value" #CDATA #REQUIRED>
<!-- Data type: Float -->
<!ELEMENT "HorizontalPhysicalPixelSpacing" EMPTY>
<!-- The horizontal distance in the subject of the image, in
millimeters, represented by one pixel at the center of the
image -->
<!ATTLIST "HorizontalPhysicalPixelSpacing" "value" #CDATA #REQUIRED>
<!-- Data type: Float -->
<!ELEMENT "VerticalPhysicalPixelSpacing" EMPTY>
<!-- The vertical distance in the subject of the image, in
millimeters, represented by one pixel at the center of the
image -->
<!ATTLIST "VerticalPhysicalPixelSpacing" "value" #CDATA #REQUIRED>
<!-- Data type: Float -->
<!ELEMENT "HorizontalPosition" EMPTY>
<!-- The horizontal position, in millimeters, where the image
should be rendered on media -->
<!ATTLIST "HorizontalPosition" "value" #CDATA #REQUIRED>
<!-- Data type: Float -->
<!ELEMENT "VerticalPosition" EMPTY>
<!-- The vertical position, in millimeters, where the image should
be rendered on media -->
<!ATTLIST "VerticalPosition" "value" #CDATA #REQUIRED>
<!-- Data type: Float -->
<!ELEMENT "HorizontalPixelOffset" EMPTY>
<!-- The horizontal position, in pixels, where the image should be
rendered onto a raster display -->
<!ATTLIST "HorizontalPixelOffset" "value" #CDATA #REQUIRED>
<!-- Data type: Integer -->
<!ELEMENT "VerticalPixelOffset" EMPTY>
<!-- The vertical position, in pixels, where the image should be
rendered onto a raster display -->
<!ATTLIST "VerticalPixelOffset" "value" #CDATA #REQUIRED>
<!-- Data type: Integer -->
<!ELEMENT "HorizontalScreenSize" EMPTY>
<!-- The width, in pixels, of the raster display into which the
image should be rendered -->
<!ATTLIST "HorizontalScreenSize" "value" #CDATA #REQUIRED>
<!-- Data type: Integer -->
<!ELEMENT "VerticalScreenSize" EMPTY>
<!-- The height, in pixels, of the raster display into which the
image should be rendered -->
<!ATTLIST "VerticalScreenSize" "value" #CDATA #REQUIRED>
<!-- Data type: Integer -->
<!ELEMENT "Document" (FormatVersion?, SubimageInterpretation?,
ImageCreationTime?, ImageModificationTime?)>
<!-- Document information -->
<!ELEMENT "FormatVersion" EMPTY>
<!-- The version of the format used by the stream -->
<!ATTLIST "FormatVersion" "value" #CDATA #REQUIRED>
<!-- Data type: String -->
<!ELEMENT "SubimageInterpretation" EMPTY>
<!-- The interpretation of this image in relation to the other
images stored in the same stream -->
<!ATTLIST "SubimageInterpretation" "value" ("Standalone" |
"SinglePage" | "FullResolution" | "ReducedResolution" |
"PyramidLayer" | "Preview" | "VolumeSlice" | "ObjectView" |
"Panorama" | "AnimationFrame" | "TransparencyMask" |
"CompositingLayer" | "SpectralSlice" | "Unknown") #REQUIRED>
<!ELEMENT "ImageCreationTime" EMPTY>
<!-- The time of image creation -->
<!ATTLIST "ImageCreationTime" "year" #CDATA #REQUIRED>
<!-- The full year (e.g., 1967, not 67) -->
<!-- Data type: Integer -->
<!ATTLIST "ImageCreationTime" "month" #CDATA #REQUIRED>
<!-- The month, with January = 1 -->
<!-- Data type: Integer -->
<!-- Min value: 1 (inclusive) -->
<!-- Max value: 12 (inclusive) -->
<!ATTLIST "ImageCreationTime" "day" #CDATA #REQUIRED>
<!-- The day of the month -->
<!-- Data type: Integer -->
<!-- Min value: 1 (inclusive) -->
<!-- Max value: 31 (inclusive) -->
<!ATTLIST "ImageCreationTime" "hour" #CDATA "0">
<!-- The hour from 0 to 23 -->
<!-- Data type: Integer -->
<!-- Min value: 0 (inclusive) -->
<!-- Max value: 23 (inclusive) -->
<!ATTLIST "ImageCreationTime" "minute" #CDATA "0">
<!-- The minute from 0 to 59 -->
<!-- Data type: Integer -->
<!-- Min value: 0 (inclusive) -->
<!-- Max value: 59 (inclusive) -->
<!ATTLIST "ImageCreationTime" "second" #CDATA "0">
<!-- The second from 0 to 60 (60 = leap second) -->
<!-- Data type: Integer -->
<!-- Min value: 0 (inclusive) -->
<!-- Max value: 60 (inclusive) -->
<!ELEMENT "ImageModificationTime" EMPTY>
<!-- The time of the last image modification -->
<!ATTLIST "ImageModificationTime" "year" #CDATA #REQUIRED>
<!-- The full year (e.g., 1967, not 67) -->
<!-- Data type: Integer -->
<!ATTLIST "ImageModificationTime" "month" #CDATA #REQUIRED>
<!-- The month, with January = 1 -->
<!-- Data type: Integer -->
<!-- Min value: 1 (inclusive) -->
<!-- Max value: 12 (inclusive) -->
<!ATTLIST "ImageModificationTime" "day" #CDATA #REQUIRED>
<!-- The day of the month -->
<!-- Data type: Integer -->
<!-- Min value: 1 (inclusive) -->
<!-- Max value: 31 (inclusive) -->
<!ATTLIST "ImageModificationTime" "hour" #CDATA "0">
<!-- The hour from 0 to 23 -->
<!-- Data type: Integer -->
<!-- Min value: 0 (inclusive) -->
<!-- Max value: 23 (inclusive) -->
<!ATTLIST "ImageModificationTime" "minute" #CDATA "0">
<!-- The minute from 0 to 59 -->
<!-- Data type: Integer -->
<!-- Min value: 0 (inclusive) -->
<!-- Max value: 59 (inclusive) -->
<!ATTLIST "ImageModificationTime" "second" #CDATA "0">
<!-- The second from 0 to 60 (60 = leap second) -->
<!-- Data type: Integer -->
<!-- Min value: 0 (inclusive) -->
<!-- Max value: 60 (inclusive) -->
<!ELEMENT "Text" (TextEntry)*>
<!-- Text information -->
<!ELEMENT "TextEntry" EMPTY>
<!-- A text entry -->
<!ATTLIST "TextEntry" "keyword" #CDATA #IMPLIED>
<!-- A keyword associated with the text entry -->
<!-- Data type: String -->
<!ATTLIST "TextEntry" "value" #CDATA #REQUIRED>
<!-- the text entry -->
<!-- Data type: String -->
<!ATTLIST "TextEntry" "language" #CDATA #IMPLIED>
<!-- The language of the text -->
<!-- Data type: String -->
<!ATTLIST "TextEntry" "encoding" #CDATA #IMPLIED>
<!-- The encoding of the text -->
<!-- Data type: String -->
<!ATTLIST "TextEntry" "compression" ("none" | "lzw" | "zip" |
"bzip" | "other") "none">
<!-- The method used to compress the text -->
<!ELEMENT "Transparency" (Alpha?, TransparentIndex?,
TransparentColor?, TileTransparencies?, TileOpacities?)>
<!-- Transparency information -->
<!ELEMENT "Alpha" EMPTY>
<!-- The type of alpha information contained in the image -->
<!ATTLIST "Alpha" "value" ("none" | "premultiplied" |
"nonpremultiplied") "none">
<!ELEMENT "TransparentIndex" EMPTY>
<!-- A palette index to be treated as transparent -->
<!ATTLIST "TransparentIndex" "value" #CDATA #REQUIRED>
<!-- Data type: Integer -->
<!ELEMENT "TransparentColor" EMPTY>
<!-- An RGB color to be treated as transparent -->
<!ATTLIST "TransparentColor" "value" #CDATA #REQUIRED>
<!-- Data type: List of Integer -->
<!ELEMENT "TileTransparencies" (TransparentTile)*>
<!-- A list of completely transparent tiles -->
<!ELEMENT "TransparentTile" EMPTY>
<!-- The index of a completely transparent tile -->
<!ATTLIST "TransparentTile" "x" #CDATA #REQUIRED>
<!-- The tile's X index -->
<!-- Data type: Integer -->
<!ATTLIST "TransparentTile" "y" #CDATA #REQUIRED>
<!-- The tile's Y index -->
<!-- Data type: Integer -->
<!ELEMENT "TileOpacities" (OpaqueTile)*>
<!-- A list of completely opaque tiles -->
<!ELEMENT "OpaqueTile" EMPTY>
<!-- The index of a completely opaque tile -->
<!ATTLIST "OpaqueTile" "x" #CDATA #REQUIRED>
<!-- The tile's X index -->
<!-- Data type: Integer -->
<!ATTLIST "OpaqueTile" "y" #CDATA #REQUIRED>
<!-- The tile's Y index -->
<!-- Data type: Integer -->
]>