| 摘要 |
The invention relates to compatibility between two or more file formats. In particular, for creating compressed files (eg ZIP) that are compatible with page descriptor language applications (eg Acrobat, Metro). Included are systems and methods to create and process compressed files that are backwards compatible in a page descriptor language format environment. A document in a page descriptor format is incorporating into a compressed file. An offset is used to locate the page descriptor format document.
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