towards this direction we have developed RDOTE (Relational Databases to Ontologies Transformation Engine), a framework able to map multiple Relational Databases in case they contain highly normalized structures or even structures in first normal form, into different ontology schemata and integrate them into a single OWL (van Harmelen and McGuinness, 2004) file. RDOTE supports the automatic creation of mappings based on the Direct Mapping approach, which currently is a W3C candidate recommendation.