X-Query.com
- Resources for programmers including the BumbleBee Test Harness.
- http://x-query.com/

An Introduction to XQuery
- Howard Katz introduces the XQuery specification, providing some background history, a road map into the documentation, and an overview of some of the technical issues involved.
- http://www-128.ibm.com/developerworks/xml/library/x-xquery.html

Schema-Aware Queries and Stylesheets
- Article by Michael Kay introducing an important new feature of XQuery and XSLT 2.0: support for XML schemas.
- http://www.stylusstudio.com/schema_aware.html

XQuery: Reinventing the Wheel?
- An examination of the overlap in the functionality of XQuery and XSLT, and of the use of XSLT as a query language.
- http://www.xmlportfolio.com/xquery.html

XQuery: An XML Query Language
- This paper explains the need for an XML query language, provides a tutorial overview of XQuery, and includes several examples of its use.
- http://www.research.ibm.com/journal/sj/414/chamberlin.pdf

XQJ Tutorial: Introduction to the XQuery API for Java
- Tutorial explaining how to use XQJ (XQuery API for Java - (JSR 225), which allows programmers to invoke and process XQuery expressions from within Java applications.
- http://www.datadirect.com/developer/xquery/topics/xqj_tutorial/index.ssp

XML Cover Pages: XML and Query Languages
- Open OASIS and Robin Cover's archive of news relating to XQuery and other XML query languages.
- http://www.oasis-open.org/cover/xmlQuery.html

Stylus Studio: XQuery Zone
- Includes tools, components, tutorials, videos demonstrations, whitepapers, use cases and discussion forums.
- http://www.stylusstudio.com/xquery/

Mailing List: www-ql@w3.org
- The W3C's public list for discussion of Query Languages, including (but not limited to) discussion on the XML Query project.
- http://lists.w3.org/Archives/Public/www-ql/