Peter Spyns Daniel Oberle Raphael Volz Jijuan Zheng Mustafa Jarrar York Sure Rudi Studer Robert Meersman OntoWeb - A Semantic Web Community Portal. 189-200 2002 conf/pakm/2002 PAKM http://dx.doi.org/10.1007/3-540-36277-0_18 db/conf/pakm/pakm2002.html#SpynsOVZJSSM02