A Stream-Temporal Query Language for Ontology Based Data Access

ABSTRACT. The paper contributes to the recent enterprise of temporalizing and streamifiying ontology based data access (OBDA) by discussing rewritability and unfoldability aspects for DL-Lite instantiations of the new query-language framework STARQL. In particular, it demonstrates how STARQL queries can be rewritten and unfolded into queries expressed in one of the early relational stream query languages, the continuous query language CQL.