Ben Handy Dan Suciu XViz: A Tool for Visualizing XPath Expressions. 134-148 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2824&spage=134 2003 conf/xsym/2003 Xsym db/conf/xsym/xsym2003.html#HandyS03