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Now showing items 11-13 of 13
A rule system for querying persistent RDFS data
(2009)
We present GiaBATA, a system for storing, aggregating, and querying Semantic Web data, based on declarative logic programming technology, namely on the dlvhex system, which allows us to implement a fully SPARQL compliant ...
On the efficiency of joining group patterns in SPARQL queries
(2010)
In SPARQL, conjunctive queries are expressed by using shared variables across sets of triple patterns, also called basic graph patterns. Based on this characterization, basic graph patterns in a SPARQL query can be ...
Embedding non-ground logic programs into autoepistemic logic for knowledge base combination
(2011)
In the context of the Semantic Web, several approaches to the combination of ontologies, given in terms of theories of classical first-order logic and rule bases, have been proposed. They either cast rules into classical ...