English

Portable document format reference manual

This book describes the Portable Document Format (PDF), the native file format of the Adobe® Acrobat® family of products. The goal of these products is to enable users to easily and reliably exchange and view electronic documents independent of the environment in which they were created. PDF relies on the imaging model of the PostScript® language to describe text and graphics in a device- and resolution-independent manner. To improve performance for interactive viewing, PDF defines a more structured format than that used by most PostScript language programs. PDF also includes objects, such as annotations and hypertext links, that are not part of the page itself but are useful for interactive viewing. PDF files are built from a sequence of numbered objects similar to those used in the PostScript language. The text, graphics, and images that make up the contents of a page are represented using operators based on those in the PostScript language, and closely follow the Adobe Illustrator® 3.0 page description operators. A PDF file is not a PostScript language program and cannot be directly interpreted by a PostScript interpreter. However, the page descriptions in a PDF file can be conv

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