Ontology-Based Knowledge Discovery on the World-Wide Web 1996 Web Agents that Work 1997 Ontology-Based Web Agents 1997 Reading Between the Lines: Using SHOE to Discover Implicit Knowledge from the Web 1998 Applying Ontology to the Web: A Case Study 1999 Coping with Changing Ontologies in a Distributed Environment 1999 SHOE: A Knowledge Representation Language for Internet Applications 1999 Searching the Web with SHOE 2000 Dynamic Ontologies on the Web 2000 Semantic Interoperability on the Web 2000