%0 Report %D 2003 %T Role-Oriented Models for Hypermedia Construction –- Conceptual Modeling for the Semantic Web %A Allert, Heidrun %A Dolog, Peter %A Nejdl, Wolfgang %A Siberski, Wolf %A Steimann, Friedrich %I Learninglab Lower Saxony, University of Hannover %8 feb %9 Technical Report