Berkeley DB XML

Berkeley DB XML is an open-source, freely available native XML database by Oracle, an alternative to eXist.

Links

 * http://www.oracle.com/database/berkeley-db/xml/index.html
 * Oracle's documentation
 * Introduction to Berkeley DB XML from codeproject.com, updated in 2007
 * XqUSEme - Firefox add-on which allows XQueries on BDBXML databases