XWDB is an XML database integration toolkit for XML, relational, and
graph databases. The toolkit includes an XML adaptor for RDBMSs, a
graph/XML data store implemented using a RDBMS, and tools for browsing
and querying federated databases.

Information on the XWDB project may be found at the project website
http://www.xwdb.org. The project is located at sourceforge, and
additional documentation (and source code) may be found there
at http://sourceforge.net/projects/xwdb/.

The XMLDB module of XWDB contains a bidirectional XML adaptor for
RDBMSs, an XML data store implemented using a RDBMS, and extensions to
use the system from Apache Taglibs. It is derived from the softare
distributed with the book "Desiging XML Databases" by Mark Graves,
published by Prentice Hall Publishing, 2002. Although the software has
been refactored and extended since the book was published, the book
contains general information that documents the system and explains
the concepts behind it. More information on the book, as well as
examples from it, can be found at the book's web site
http://www.phptr.com/graves.

This software is copyright 2002 by XWeave, LLC and distributed under
the terms of the GNU Lesser General Public License. XWeave, LLC, is a
professional services company that specializes in XML database
integration. More information on XWeave may be found at
http://www.xweave.com

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

More information is in the Installation instructions.