Database containing some 2000 documents. The XML Cover Pages is a comprehensive online reference work for the Extensible Markup Language (XML) and its parent, the Standard Generalized Markup Language (SGML). The reference collection features extensive documentation on the application of the open, interoperable "markup language" standards, including XSL, XSLT, XPath, XLink, XPointer, HyTime, DSSSL, CSS, SPDL, CGM, ISO-HTML, and others.

This is an overview of resources related to SGML and the Web, originally assembled for reviewers of the HTML 2.0 specification.