XML is a data format for
structured document exchange. XML grew out of SGML. Like SGML
(and indeed HTML), anExtensible Markup Language document consists of
tags and text.
In XML, the document designer defines the
tags that are valid for that document, and assigns their
meanings. This is in contrast to HTML, where valid tags
and their meanings are fixed. The syntax of an Extensible
Markup Language document is specified in an XML
schema or XML DTD (XML document type definition).
Other topics in our resources on XML related to XML include: