The Extensible Markup Language (XML) is a general-purpose markup language.[1] Its primary purpose is to facilitate the sharing of data across different information systems, particularly via the Internet.[2]

It is a simplified subset of the Standard Generalized Markup Language (SGML), and is designed to be relatively human-legible. By adding semantic constraints, application languages can be implemented in XML.

1. Just Enough XML to Survive - This presentation explains the basics of XML and XML Schema.

2. Create your own XML channel within 10 minutes - Short, step by step ysw web tutorial shows how to create very simple and functional XML channel (RSS) for distrubution of media content as adio or video files.

3. XML Part 1 - SGML, XML and HTML Part 1

4. XML Part 2 - SGML, XML and HTML Part 2