Now showing items 1-6 of 6

  • dlvhex-sparql: A SPARQL-compliant query engine based on dlvhex 

    Polleres, Axel (CEUR, 2007)
    This paper describes the dlvhex SPARQL plugin, a query processor for the upcoming Semantic Web query language standard by W3C. We report on the implementation of this languages using dlvhex, a flexible plugin system ...
  • inContext: A Pervasive and Collaborative Working Environment for Emerging Team Forms 

    Polleres, Axel (2008)
    Participants in current team collaborations belong to different organizations, work on multiple objectives at the same time, and frequently change locations. They use different devices and infrastructures in collaboration ...
  • Processing ontology alignments with SPARQL 

    Polleres, Axel (IEEE, 2008)
    Solving problems raised by heterogeneous ontologies can be achieved by matching the ontologies and processing the resulting alignments. This is typical of data mediation in which the data must be translated from one ...
  • Scalable Authoritative OWL Reasoning on a Billion Triples 

    Hogan, Aidan; Harth, Andreas; Polleres, Axel (2008)
    In this paper we present a scalable algorithm for performing a subset of OWL reasoning over web data using a rule-based approach to forward-chaining; in particular, we identify the problem of ontology hijacking: new ...
  • Towards Fine-grained Service Matchmaking by Using Concept Similarity 

    Polleres, Axel (2007)
    Several description frameworks to semantically describe and match services on the one hand and service requests on the other have been presented in the literature. Many of the current proposals for defining notions of ...
  • Who the FOAF knows Alice? A needed step towards Semantic Web Pipes 

    Polleres, Axel; Tummarello, Giovanni (2007)
    In this paper we take a view from the bottom to RDF(S) reasoning. We discuss some issues and requirements on reasoning towards effectively building SemanticWeb Pipes, aggregating RDF data from various distributed sources. ...