PNG (Portable Network Graphics) Specification, Tenth Draft

Revision date: 5 May, 1995

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8. Multi-Image Extension

PNG itself is strictly a single-image format. However, it may be necessary to store multiple images within one file; for example, this is needed to convert some GIF files. For this purpose, a multi-image format will be defined in the near future. PNG decoders will not be required to support the multi-image extension.

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