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Other document markup languages are partly related to SGML and XML, but—because they cannot be parsed or validated or otherwise processed using standard SGML and XML tools—they are not considered either SGML or XML languages; the Z Format markup language for typesetting and documentation is an example.
In computing, FOSI (Formatting Output Specification Instance) is a stylesheet language for SGML and, later, XML. FOSI was developed by the US Department of Defense to control the pagination and layout of SGML and XML technical data. FOSI stylesheets are themselves written in SGML, an approach that would later be adopted by XSL.
XML is a successor of SGML. XSL-FO is most often used to generate PDF files from XML files. The arrival of SGML/XML as the document model made other typesetting engines popular. Such engines include Datalogics Pager, Penta, Miles 33's OASYS, Xyvision's XML Professional Publisher, FrameMaker, and Arbortext.
The difference with the GIF image, is that the SVG image is parsed within the SGML document, according to the declarations in the DTD, where the GIF image is just referenced as an opaque external object (which is not parsable with SGML) via its "data" attribute (whose value type is an opaque ENTITY).
DVI or Portable Document Format (PDF) converter Texinfo: 1986 Richard Stallman: Text editor: output to DVI, Portable Document Format (PDF), HTML, DocBook, others. TeXmacs format: 1998 Joris van der Hoeven: Text editor/TeXmacs editor: PDF or PostScript files. Converters exist for TeX/LaTeX and XHTML+Mathml: Textile: 2002 [3] Dean Allen Text editor
The Document Style Semantics and Specification Language (DSSSL) is an international standard developed to provide stylesheets for SGML documents. [1]DSSSL consists of two parts: a tree transformation process that can be used to manipulate the tree structure of documents prior to presentation, and a formatting process that associates the elements in the source document with specific nodes in ...
A document type declaration, or DOCTYPE, is an instruction that associates a particular XML or SGML document (for example, a web page) with a document type definition (DTD) (for example, the formal definition of a particular version of HTML 2.0 - 4.0). [1]
In SGML, HTML and XML documents, the logical constructs known as character data and attribute values consist of sequences of characters, in which each character can manifest directly (representing itself), or can be represented by a series of characters called a character reference, of which there are two types: a numeric character reference and a character entity reference.