OWLS-SLR (SLR stands for Structural and Logic-based Reasoning) is a semantic Web service matchmaker written in Java that makes use of OWL-S Profiles. It follows the abstract Web service discovery approach, performing matchmaking based on inputs, outputs and non-functional properties. The matchmaking algorithm exploits not only the ontology subsumption hierarchy, but also the structural knowledge of the domain ontologies, such as sibling relationships among concepts.
