The purpose of this presentation was to help conference attendees gain sufficient experience of working with OWL and tools (e.g., the Swoop ontology editor/browser) to [...]
Most of the Web of Data is limited to a large compendium of encyclopedic knowledge describing entities. The timely and massive extraction of RDF facts [...]
SPARQL entailment regimes are strongly influenced by the big body of works on ontology-based query answering, notably in the area of Description Logics (DLs). However, [...]
Updates in RDF stores have recently been standardized in the SPARQL 1.1 Update specification. However, computing answers entailed by ontologies in triple stores is usually [...]
This chapter accompanied the lecture on SPARQL with entailment regimes given at the 7th Reasoning Web Summer School in Galway, Ireland, 2011. It first introduces [...]
This research paper addresses the problem of SPARQL query containment, which is defined as determining if the result of one query is included in the [...]
This paper describes the extension of the Semantic Web query language SPARQL by defining the semantics of SPARQL queries under the entailment regimes of RDF, [...]
SPARQL 1.1 supports the use of ontologies to enrich query results with logical entailments, and OWL 2 provides a dedicated fragment OWL QL for this [...]
This paper studies the semantics of SPARQL queries with optional matching features under entailment regimes. It argues that the normative semantics may lead to answers [...]
SPARQL is the W3C standard for querying RDF data, but it mostly provides means for querying simple RDF graphs only, whereas querying with respect to [...]