A promising method for efficiently querying RDF data consists of translating SPARQL
queries into efficient RDBMS-style operations. However, answering SPARQL queries …

Ontology-mediated query answering (OMQA) is a recent approach to data access in which
conceptual knowledge provided by an ontology is exploited when querying incomplete data …

The two-volume set LNCS 8796 and 8797 constitutes the refereed proceedings of the 13th
International Semantic Web Conference, ISWC 2014, held in Riva del Garda, in October …

There are ongoing efforts to provide declarative formalisms of integrity constraints over
RDF/S data. In this context, addressing the evolution of RDF/S knowledge bases while …

Updates in RDF stores have recently been standardised in the SPARQL 1.1 Update
specification. However, computing entailed answers by ontologies is usually treated …

This paper revisits the problem of consistency maintenance when insertions or deletions are
performed on a valid database containing marked nulls. This problem comes back to light in …

The problem of querying description logic knowledge bases using database-style queries
(in particular, conjunctive queries) has been a major focus of recent description logic …

Purpose Graph rewriting concerns the technique of transforming a graph; it is thus natural to
conceive its application in the evolution of graph databases. This paper aims to propose a …

We address the issue of database updating in the presence of constraints, using the first
order logic formalism. Based on a chasing technique, we propose a deterministic update …

In this paper, we consider transforming queries automatically according to schema update.
Suppose that we have a query q under schema S and that S is updated. Then due to the …