Query Rewriting under Linear \(\mathcal {EL}\) Knowledge Bases

With the adoption of the recent SPARQL 1.1 standard, RDF databases are capable of directly answering more expressive queries than simple conjunctive queries. In this paper we exploit such capabilities to answer conjunctive queries (CQs) under ontologies expressed in the description logic called linear (mathcal {EL}^ {ell }in ), a restrict...More