Hong Su Bintou Kane Victor Chen Cuong Diep De Ming Guan Jennifer Look Elke A. Rundensteiner A Lightweight XML Constraint Check and Update Framework. 39-50 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2784&spage=39 2002 conf/er/2002 ER (Workshops) db/conf/er/erw2002.html#SuKCDGLR02