title: answering xml queries on heterogeneous data sources. authors: ioana manolescu , donald kossmann , daniela florescu. venue: vldb. year: 2001
title: mind your vocabulary : query mapping across heterogeneous information sources. authors: chen-chuan k. chang , h &#233; ctor garc &#237; a-molina. venue: international conference on management of data. year: 1999