Generating Lowering and Lifting Schema Mappings for Semantic Web Services

With the introduction of the SAWSDL W3C recommendation, the possibility of enriching web service interfaces with semantic model references surfaced as a foundation for semantic web services. However, the recommendation says neither what the semantic model should be nor what to do with the actual XML data. In this paper, we exploit our conceptual model for XML data to generate SAWSDL enriched XML schemas, but mainly to automatically generate the so called Lifting and Lowering schema mappings in a form of XSLT scripts. These scripts can be used to transform the XML data produced by the web service into RDF data (lifting) and vice versa (lowering). In the RDF data state the data can be manipulated using a knowledge given by a corresponding ontology mapped to our model. Also the reasoning power granted by the ontology description can be exploited.