Joost Geurts Stefano Bocconi Jacco van Ossenbruggen Lynda Hardman Towards Ontology-Driven Discourse: From Semantic Graphs to Multimedia Presentations. 597-612 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2870&spage=597 2003 conf/semweb/2003 International Semantic Web Conference db/conf/semweb/iswc2003.html#GeurtsBOH03