SGML
Generated by Llama 3.3-70BExpansion Funnel Raw 69 → Dedup 30 → NER 15 → Enqueued 7
| SGML | |
|---|---|
| Name | SGML |
| Designed by | Charles Goldfarb, Ed Mosher, Ray Lorie |
| Developed by | IBM |
| First appeared | 1986 |
| Major implementations | Arbortext, Adobe FrameMaker |
| Influenced by | GML |
| Influenced | XML, HTML |
SGML is a markup language that has been widely used for document management and information exchange by organizations such as the United States Department of Defense, NASA, and the European Union. It was developed by IBM in the 1980s, with key contributions from Charles Goldfarb, Ed Mosher, and Ray Lorie, who are often referred to as the "fathers of SGML". SGML has been used by various industries, including publishing, aerospace, and automotive, with notable users such as Boeing, Lockheed Martin, and General Motors. The language has also been influential in the development of other markup languages, including XML and HTML, which were designed by Jon Bosak and Tim Berners-Lee.
Introduction to SGML
SGML is a metalanguage that allows users to define their own markup languages, making it a powerful tool for document management and information exchange. It was designed to be highly flexible and customizable, with features such as entity references and parameter entities, which were inspired by the work of Brian Kernighan and Dennis Ritchie. SGML has been used in a variety of applications, including technical writing, desktop publishing, and data exchange, with notable examples such as the SGML Open initiative and the XML/SGML Users' Group. The language has also been supported by various software vendors, including Adobe, Microsoft, and Oracle, which have developed tools such as Adobe FrameMaker and Microsoft Word.
History of SGML
The development of SGML began in the 1960s, with the work of Charles Goldfarb and his colleagues at IBM. They developed a markup language called GML, which was later standardized as SGML by the International Organization for Standardization (ISO) in 1986. The standardization process involved the participation of various organizations, including the American National Standards Institute (ANSI) and the European Computer Manufacturers Association (ECMA). SGML was widely adopted in the 1980s and 1990s, with notable users such as the United States Department of Defense and the European Union. The language has also been influenced by the work of other researchers, including Douglas Engelbart and Ted Nelson.
Basic Concepts and Syntax
SGML is based on a few basic concepts, including elements, attributes, and entities. Elements are represented by tags, which are used to delimit the start and end of an element, and are similar to those used in HTML and XML. Attributes are used to provide additional information about an element, and are similar to those used in CSS and XSLT. Entities are used to represent special characters or strings of characters, and are similar to those used in Unicode and ASCII. The syntax of SGML is defined by a set of production rules, which are used to generate a parse tree from a document, and are similar to those used in compiler design and parser generators. The language has also been influenced by the work of other researchers, including Noam Chomsky and Marvin Minsky.
Document Type Definitions
A key concept in SGML is the document type definition (DTD), which is used to define the structure and organization of a document. A DTD is a set of declarations that define the elements, attributes, and entities that are allowed in a document, and is similar to a schema in XML and XSD. DTDs are used to validate the structure of a document, and to ensure that it conforms to a particular standard or specification, such as the DocBook and TEI standards. The use of DTDs has been influenced by the work of other researchers, including Brian Reid and James Clark.
Applications and Uses
SGML has been used in a wide range of applications, including technical writing, desktop publishing, and data exchange. It has been used by various industries, including publishing, aerospace, and automotive, with notable users such as Boeing, Lockheed Martin, and General Motors. The language has also been used in various government agencies, including the United States Department of Defense and the European Union. The use of SGML has been influenced by the work of other researchers, including Ted Nelson and Douglas Engelbart.
Relationship to Other Markup Languages
SGML has been influential in the development of other markup languages, including XML and HTML. XML was designed by Jon Bosak and Tim Berners-Lee as a simplified version of SGML, with a focus on data exchange and web development. HTML was designed by Tim Berners-Lee as a markup language for the World Wide Web, and is based on a subset of SGML. The relationship between SGML and other markup languages has been influenced by the work of other researchers, including James Clark and Brian Reid. The development of SGML has also been influenced by the work of other organizations, including the World Wide Web Consortium (W3C) and the Internet Engineering Task Force (IETF).