To learn more about the XML, read our XML tutorial.

XML 1.0 was released as the W3C Recommendation 10. February 1998.

XML 1.0 (SE) was released as the W3C Recommendation 6. October 2000. Second Edition is only a correction to the XML 1.0 that incorporates the first-edition errata (bug fixes).

Third Edition is only a correction to the XML 1.0 that incorporates the first- and second-edition errata (bug fixes).

XML 1.1 was released as a Working Draft 13. December 2001, and as the Candidate Recommendation 15. October 2002. XML 1.1 allows almost any Unicode characters to be used in the names.

XML namespaces defines a method for defining element and attribute names used in the XML by associating them with URI references.

The XML Linking Language (XLink), allows you to insert links into the XML documents.

The XML Pointer Language (XPointer), allows the links to address into specific parts of the XML document.

XML Base is a standard for defining a default reference to the external XML resources (similar to <base> in HTML).

XInclude is a mechanism for merging the XML documents using elements, attributes, and URI references.

W3C XML Home Page