The PDF combines three technologies: A subset of the PostScript page description programming language, for generating the layout and graphics. Several schema systems exist to aid in the definition of XML-based languages, while programmers have developed many application programming interfaces (APIs) to aid the processing of XML data. XML is a textual data format with strong support via Unicode for different human languages.
Each PDF file encapsulates a complete description of a fixed-layout flat document, including the text, fonts, graphics, and other information needed to display it. The Portable Document Format (PDF) is a file format used to present documents in a manner independent of application software, hardware, and operating systems. The design goals of XML emphasize simplicity, generality, and usability across the Internet. In computing, Extensible Markup Language (XML) is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable.
Application/pdf, application/x-pdf, application/x-bzpdf, application/x-gzpdf
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