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The Portable Document Format (PDF) is a file format used to present documents in a manner independent of application software, hardware, and operating systems. Each PDF file encapsulates a complete description of the presentation of the document, including the text, fonts, graphics, and other information needed to display it.
The Preview application can display PDF files, as can version 2.0 and later of the Safari web browser. System-level support for PDF allows macOS applications to create PDF documents automatically, provided they support the OS-standard printing architecture. The files are then exported in PDF 1.3 format according to the file header.
PDF is a standard for encoding documents in an "as printed" form that is portable between systems. However, the suitability of a PDF file for archival preservation depends on options chosen when the PDF is created: most notably, whether to embed the necessary fonts for rendering the document; whether to use encryption; and whether to preserve additional information from the original document ...
PDF/UA (PDF/Universal Accessibility), [1] formally ISO 14289, is an International Organization for Standardization (ISO) standard for accessible PDF technology. A technical specification intended for developers implementing PDF writing and processing software, PDF/UA provides definitive terms and requirements for accessibility in PDF documents and applications. [2]
Below is a list of some of the more common document file formats, common file extensions used by the formats in parentheses: . ASCII, UTF-8 (.txt, others) — any of a number of plain text encodings that may have differing line endings depending on what system they were created or edited on
Effective redaction of electronic documents requires the removal of all relevant text and image data from the document file. This process, internally complex, can be carried out very easily by a user with the aid of "redaction" functions in software for editing PDF or other files.
DCA was later extended as MO:DCA (Mixed Object Document Content Architecture), which added embedded data files. The original purpose of DCA was to provide a common document format that could be used across multiple IBM word processing platforms, such as the IBM PC, IBM mainframes, the Displaywriter System, and the IBM 5520 Administrative System ...
It does not specify the appearance of a document; instead, it describes its structure. For example, there are special tags for epigraphs, verses and quotations. Amazon's Kindle File Format, but only in its newest version. [6] Xerox PARC has developed an experimental system that allows the reflow of any document using OCR layout analysis at word ...