3488Re: What is the XML? Someone.....
- May 28, 2004Extensible Markup Language
It is similar to HTML.
XML is the Extensible Markup Language. It is designed to improve the
functionality of the Web by providing more flexible and adaptable
It is called extensible because it is not a fixed format like HTML
(a single, predefined markup language). Instead, XML is actually a
`metalanguage' a language for describing other languageswhich lets
you design your own customized markup languages for limitless
different types of documents. XML can do this because it's written in
SGML, the international standard metalanguage for text markup systems
SGML is the Standard Generalized Markup Language (ISO 8879:1985), the
international standard for defining descriptions of the structure of
different types of electronic document. There is an SGML FAQ at
http://lamp.man.deakin.edu.au/sgml/sgmlfaq.txt which is posted every
month to the comp.text.sgml newsgroup, and the SGML Web pages are at
SGML is very large, powerful, and complex. It has been in heavy
industrial and commercial use for over a decade, and there is a
significant body of expertise and software to go with it. XML is a
lightweight cut-down version of SGML which keeps enough of its
functionality to make it useful but removes all the optional features
which make SGML too complex to program for in a Web environment.
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