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This report provides an overview of developing transformation from object models in UML to XML DTD / Schema and RDF models. Starting with defining potential content objects to be stored in the ICONS content base, we investigate approaches for representing content objects in UML, equivalence of UML semantic data models and RDF content models, and approaches of mapping UML to RDF. In this report, we also give the description of the state of the art of research initiatives in this aspect of work in some details, freeware software tools and commercial products in supporting the functionality of converting UML models to XML DTDs / Schemas and RDFS models. Finally we identify some outstanding issues and suggest the ways to deal with these issues. \