Tanel Tammet Vello Kadarpik Combining an Inference Engine with Database: A Rule Server. 136-149 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2876&spage=136 2003 conf/semweb/2003ruleml RuleML db/conf/semweb/ruleml2003.html#TammetK03