According to the ISO-IEC 9126-1 standard [5], interoperability is a software functionality sub-characteristic defined as “the capability of the software product to interact with one or more specified systems”. In order to interact with other systems a DLBS must conform to the standard input formats and must be able to perform standard inference services. In our setting, the standard input format is the OWL 2 language. We evaluate the standard inference services: – Class satisfiability; – Ontology satisfiability