![]() This is then packaged into a container format, together with all necessary dependencies for correct rendering (external files, graphics, or fonts to which the document refers), and compressed.Īs a document format, PDF has several advantages over PostScript: Historically, the PostScript-like PDF code is generated from a source PostScript file (that is, an executable program), with standard compiler techniques like loop unrolling, inlining and removing unused branches, resulting in code that is purely declarative and static. PDF is a subset of PostScript, simplified to remove such flow control features, while graphics commands remain. It can handle graphics and has standard features of programming languages such as branching and looping. PostScript is a page description language run in an interpreter to generate an image.
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