1. In 1980, IBM's thinking about making a document that will identify each element of the document with a certain mark. IBM then developed a type of language that combines text with formatting commands document. This is called Langiage Markup Language, a language which uses signs as its base. IBM calls this system as the Generalized Markup Language or GML.
2. In 1986, the ISO states that IBM has a concept of a very good document, and then issued a publication (ISO 8879) which states as a standard markup language for creating documents. ISO makes this language from IBM's GML, but gave him another name, that is SGML (Standard Generalized Markup Language).
ISO in its publications believed that SGML will be very useful for text information processing and office systems. But beyond the estimates of ISO, especially a subset of SGML and SGML, HTML is also useful for exploring the Internet. Especially for those who use the World Wide Web. The latest version of HTML is HTML 4.01, though this time has developed XHTML which is the development of HTML
Source :http://id.wikipedia.org/wiki/HTML
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