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As a document format, PDF has several advantages over PostScript:
* PDF contains only static [[Declarative programming|declarative]] PostScript code, that can be processed as data, and does not require a full program [[Interpreter (computing)|interpreter]] or [[compiler]]. This avoids the complexity and security risks of an engine with such a higher complexity level.
* Like [[Display PostScript]], since version 1.4 PDF supports [[transparency (graphic)|transparent graphics]], while standard PostScript does not.
* PDF enforces the rule that the code for a page cannot affect any other pages. That rule is strongly recommended for PostScript code too, but has to be implemented explicitly, as PostScript is a full programming language that allows for such greater flexibilities and is not limited to the concepts of pages and documents.
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