Tag ID Tag Name Writable Values / Notes 'BACK' Background - --> MNG Background Tags 'BASI' BasisObject - --> MNG BasisObject Tags 'CLIP' ClipObjects - --> MNG ClipObjects Tags 'CLON' CloneObject - --> MNG CloneObject Tags 'DBYK' DropByKeyword N 'DEFI' DefineObject - --> MNG DefineObject Tags 'DHDR' DeltaPNGHeader - --> MNG DeltaPNGHeader Tags 'DISC' DiscardObjects N 'DROP' DropChunks N 'FRAM' Frame N 'JHDR' JNGHeader - --> MNG JNGHeader Tags 'LOOP' Loop - --> MNG Loop Tags 'MAGN' MagnifyObject - --> MNG MagnifyObject Tags 'MHDR' MNGHeader - --> MNG MNGHeader Tags 'MOVE' MoveObjects - --> MNG MoveObjects Tags 'ORDR' OrderingRestrictions N 'PAST' PasteImage - --> MNG PasteImage Tags 'PPLT' PartialPalette N 'PROM' PromoteParent - --> MNG PromoteParent Tags 'SAVE' SaveObjects N 'SEEK' SeekPoint N 'SHOW' ShowObjects - --> MNG ShowObjects Tags 'TERM' TerminationAction - --> MNG TerminationAction Tags 'eXPi' ExportImage - --> MNG ExportImage Tags 'fPRI' FramePriority - --> MNG FramePriority Tags 'nEED' ResourcesNeeded N 'pHYg' GlobalPixelSize - --> PNG PhysicalPixel Tags
Index Tag Name Writable Values / Notes 0 BackgroundColor N 6 MandatoryBackground N 0 = Color and Image Advisory
1 = Color Mandatory, Image Advisory
2 = Color Advisory, Image Mandatory
3 = Color and Image Mandatory7 BackgroundImageID N 9 BackgroundTiling N 0 = No
1 = Yes
Index Tag Name Writable Values / Notes 0 ImageWidth N 4 ImageHeight N 8 BitDepth N 9 ColorType N 0 = Grayscale
2 = RGB
3 = Palette
4 = Grayscale with Alpha
6 = RGB with Alpha10 Compression N 0 = Deflate/Inflate 11 Filter N 0 = Adaptive 12 Interlace N 0 = Noninterlaced
1 = Adam7 Interlace13 RedSample N 17 GreenSample N 21 BlueSample N 25 AlphaSample N 26 Viewable N
Index Tag Name Writable Values / Notes 0 FirstObject N 2 LastObject N 4 DeltaType N 0 = Absolute
1 = Relative5 ClipBoundary N
Index Tag Name Writable Values / Notes 0 SourceID N 2 CloneID N 4 CloneType N 0 = Full
1 = Parital
2 = Renumber object5 DoNotShow N 6 ConcreteFlag N 7 LocalDeltaType N 0 = Absolute
1 = Relative8 DeltaXY N
Index Tag Name Writable Values / Notes 0 ObjectID N 2 DoNotShow N 3 ConcreteFlag N 4 XYLocation N 12 ClippingBoundary N
Index Tag Name Writable Values / Notes 0 ObjectID N 2 ImageType N 0 = Unspecified
1 = PNG
2 = JNG3 DeltaType N 0 = Full Replacement
1 = Pixel Addition
2 = Alpha Addition
3 = Color Addition
4 = Pixel Replacement
5 = Alpha Replacement
6 = Color Replacement
7 = No Change4 BlockSize N 12 BlockLocation N
Index Tag Name Writable Values / Notes 0 ImageWidth N 4 ImageHeight N 8 ColorType N 8 = Gray
10 = Color
12 = Gray Alpha
14 = Color Alpha9 BitDepth N 10 Compression N 8 = Huffman-coded baseline JPEG 11 Interlace N 0 = Sequential
8 = Progressive12 AlphaBitDepth N 13 AlphaCompression N 0 = MNG Grayscale IDAT
8 = JNG 8-bit Grayscale JDAA14 AlphaFilter N 0 = Adaptive MNG (N/A for JPEG) 15 AlphaInterlace N 0 = Noninterlaced
Index Tag Name Writable Values / Notes 0 NestLevel N 1 IterationCount N 5 TerminationCondition N 0 = Deterministic, not cacheable
1 = Decoder discretion, not cacheable
2 = User discretion, not cacheable
3 = External signal, not cacheable
4 = Deterministic, cacheable
5 = Decoder discretion, cacheable
6 = User discretion, cacheable
7 = External signal, cacheable6 IterationMinMax N 14 SignalNumber N
Index Tag Name Writable Values / Notes 0 FirstObjectID N 2 LastObjectID N 4 XMethod N 0 = No Magnification
1 = Pixel Replication
2 = Linear Interpolation
3 = Closest Pixel
4 = Color Linear Interpolation and Alpha Closest Pixel
5 = Color Closest Pixel and Alpha Linear Interpolation5 XMag N 7 YMag N 9 LeftMag N 11 RightMag N 13 TopMag N 15 BottomMag N 17 YMethod N 0 = No Magnification
1 = Pixel Replication
2 = Linear Interpolation
3 = Closest Pixel
4 = Color Linear Interpolation and Alpha Closest Pixel
5 = Color Closest Pixel and Alpha Linear Interpolation
Index Tag Name Writable Values / Notes 0 ImageWidth N 1 ImageHeight N 2 TicksPerSecond N 3 NominalLayerCount N 4 NominalFrameCount N 5 NominalPlayTime N 6 SimplicityProfile N
Index Tag Name Writable Values / Notes 0 FirstObject N 2 LastObject N 4 DeltaType N 0 = Absolute
1 = Relative5 DeltaXY N
Index Tag Name Writable Values / Notes 0 DestinationID N 2 TargetDeltaType N 0 = Absolute
1 = Relative3 TargetXY N 11 SourceID N 13 CompositionMode N 0 = Over
1 = Replace
2 = Under14 Orientation N 0 = Same as source
2 = Flipped left-right, then up-down
4 = Flipped left-right
6 = Flipped up-down
8 = Tiled15 OffsetOrigin N 0 = Desination Origin
1 = Target Origin16 OffsetXY N 24 BoundaryOrigin N 0 = Desination Origin
1 = Target Origin25 PastClippingBoundary N
Index Tag Name Writable Values / Notes 0 NewColorType N 1 NewBitDepth N 2 FillMethod N 0 = Bit Replication
1 = Zero Fill
Index Tag Name Writable Values / Notes 0 FirstObject N 2 LastObject N 4 ShowMode N
Index Tag Name Writable Values / Notes 0 TerminationAction N 0 = Show Last Frame
1 = Display Nothing
2 = Show First Frame
3 = Repeat Sequence1 IterationEndAction N 0 = Show Last Frame
1 = Display Nothing
2 = Show First Frame2 Delay N 6 IterationMax N
Index Tag Name Writable Values / Notes 0 SnapshotID N 2 SnapshotName N
Index Tag Name Writable Values / Notes 0 DeltaType N 0 = Absolute
1 = Relative2 Priority N