XML
The Extensible Markup Language (XML) is a general-purpose specification for creating custom markup languages.[1] It is classified as an extensible language because it allows its users to define their own elements. Its primary purpose is to facilitate the sharing of structured data across different information systems, particularly via the Internet,[2] and it is used both to encode documents and to serilize data. In the latter context, it is comparable with other text-based serialization languages such as JSON and YAML
XML > FAQs & Tutorials
Adamson House - XML, JavaScript online tutorials. A pure XML Web page.
http://www.adamsonhouse.com/
XML Programming Tutorial - The March 2001 Troubleshooting Professional Magazine is entirely devoted to an XML Programming Tutorial on the Linux platform using Xerces-Java. DOM, SAX, DTD's.
http://www.troubleshooters.com/tpromag/200103/200103.htm
Skew.org XML Tutorial - The skew.org XML Tutorial by Mike J. Brown provides a reintroduction to XML with an emphasis on character encoding.
http://skew.org/xml/tutorial/
XML School - A well organized and easy to understand free tutorial with lots of examples and source code.
http://www.w3schools.com/xml/
ZVON XML Tutorial - This is the main page for ZVON's and quite excellent XML tutorial site. Topics range from XML v. 1.0 to XSL, WML, SVG and the DOM.
http://www.zvon.org/index.php?nav_id=2
Code Toad - XML Scripts and Tutorials - Index of free XML scripts and tutorials, including sections on XSL, DTD, XML and Java and XML-DOM.
http://www.codetoad.com/xml/
Tek-Tips Forum: XML - Technical support forums and mutual help system for computer professionals.
http://www.tek-tips.com/threadminder.cfm?pid=426
WebDeveloper.com: The XML Files - Detailed look with resources, newsletter and industry news.
http://www.webdeveloper.com/xml/