This tutorial has taken a sample document and, using only standards-based approaches, stored, searched, and retrieved it. Many of the tools mentioned in this tutorial are available at no cost and, in their turn, are becoming de facto standards. Eclipse (the new Emacs) is a joy to use, as is Apache Derby, a JDBC wunderkind. DB2, Version 9 points to the future, with pureXML making several approaches in this tutorial obsolete, but not the underlying standards. And that's the whole point, isn't it?
The fourth and final part of this tutorial series will return to working with SOX documents, completing a miniature SOX tracking application using OpenOffice.org and SQL tools.