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This is an accepted version of this page This is the latest accepted revision, reviewed on 18 September 2024. Portable Document Format, a digital file format For other uses, see PDF (disambiguation). Portable Document Format Adobe PDF icon Filename extension.pdf Internet media type application/pdf, application/x-pdf application/x-bzpdf application/x-gzpdf Type code PDF (including a single ...
History of PDF. The Portable Document Format (PDF) was created by Adobe Systems, introduced at the Windows and OS/2 Conference in January 1993 and remained a proprietary format until it was released as an open standard in 2008. Since then, it has been under the control of an International Organization for Standardization (ISO) committee of ...
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 ...
AES and QES have a higher evidentiary value than simple or ‘standard’ electronic signatures. QES is recognised the same legal value as a handwritten signature. [3] PAdES standards travel in the same direction and have the same aims as digital signatures (AES and QES). This means they can be easily verified in any PDF reader and as [5]
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]
The following is a comparison of e-book formats used to create and publish e-books. The EPUB format is the most widely supported e-book format, supported by most e-book readers except Amazon Kindle [a] devices. Most e-book readers also support the PDF and plain text formats. E-book software can be used to convert e-books from one format to ...
A document file format is a text or binary file format for storing documents on a storage media, especially for use by computers. There currently exist a multitude of incompatible document file formats. Examples of XML -based open standards are DocBook, XHTML, and, more recently, the ISO / IEC standards OpenDocument (ISO 26300:2006) and Office ...
The Digital Standards Organization (DIGISTAN) states that "an open standard must be aimed at creating unrestricted competition between vendors and unrestricted choice for users." [ 39 ] Its brief definition of "open standard" (or "free and open standard") is "a published specification that is immune to vendor capture at all stages in its life ...
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