First Order-Rewritability and Containment of Conjunctive Queries in Horn Description Logics
Description Logics, 2016.
We study FO-rewritability of conjunctive queries in the presence of ontologies formulated in a description logic between EL and Horn-SHIF, along with related query containment problems. Apart from providing characterizations, we establish complexity results ranging from EXPTIME via NEXPTIME to 2EXPTIME, pointing out several interesting ef...More
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