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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]
A PDF file is organized using ASCII characters, except for certain elements that may have binary content. The file starts with a header containing a magic number (as a readable string) and the version of the format, for example %PDF-1.7. The format is a subset of a COS ("Carousel" Object Structure) format. [24]
HTML is the most used and open international standard and it is also used as document file format. It has also become ISO / IEC standard (ISO 15445:2000). The default binary file format used by Microsoft Word ( .doc ) has become widespread de facto standard for office documents, but it is a proprietary format and is not always fully supported ...
DOC is a document file format that is directly supported by few e-book readers. Its advantages as an e-book format is that it can be easily converted to other e-book formats and it can be reflowed. It can be easily edited using Microsoft software, and any of several other programs.
The container's scope can be identified by start- and end-markers of some kind, by an explicit length field somewhere, or by fixed requirements of the file format's definition. Throughout the 1970s, many programs used formats of this general kind. For example, word-processors such as troff, Script, and Scribe, and database export files such as CSV.
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 ...
Antiphrasis is the rhetorical device of saying the opposite of what is actually meant in such a way that it is obvious what the true intention is. [1] Some authors treat and use antiphrasis just as irony, euphemism or litotes. [2] When the antiphrasal use is very common, the word can become an auto-antonym, [3] having opposite meanings ...
3D artwork, e.g. support for Universal 3D file format; OpenType font embedding; support for XFA 2.2 rich text elements and attributes (XFA 2.1 and 2.2 defined for example the following features: dynamic XFA forms, W3C XML digital signatures for XFA, XFA support for Web Services, XFA 'doc-literal' SOAP operations over HTTP, the Web Service's ...