Introduction to XML for Web Developers is a four-part course designed by Selena Sol. Other tutorials are available at Web Ware.
What is XML Like HTML, XML (also known as Extensible Markup Language) is a markup language which relies on the concept of rule-specifying tags and the use of a tag-processing application that knows how to deal with the tags.
"The correct title of this specification, and the correct full name of XML, is "Extensible Markup Language". "eXtensible Markup Language" is just a spelling error. However, the abbreviation "XML" is not only correct but, appearing as it does in the title of the specification, an official name of the Extensible Markup Language.
The name and abbreviation were invented by James Clark; other options under consideration had included MGML, (Minimal Generalized Markup Language), MAGMA (Minimal Architecture For Generalized Markup Applications), and SLIM (Structured Language for Internet Markup)" - Extensible Markup Language (XML) 1.0 Specs, The Annotated Version.