Nancy Wiegand Naijun Zhou Stephen J. Ventura Isabel F. Cruz William Sunna Resolving Schema and Value Heterogeneities for XML Web Querying. 2003 DG.O http://diggov.org/dgrc/dgo2003/cdrom/DEMOS/demos2/wiegand.pdf db/conf/dgo/dgo2003.html#WiegandZVS03