Now showing items 1-20 of 38

  • Automatic Location of Services 

    Keller, Uwe; Polleres, Axel; Fensel, Dieter (2005)
    The automatic location of services that fulfill a given need is seen as a key step towards dynamic and scalable integration. In this paper we present a model for the automatic location of services that considers the static ...
  • 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 ...
  • Dynamic Querying of Mass-Storage RDF Data with Rule-Based Entailment Regimes 

    Krennwallner, Thomas; Martello, Alessandra; Polleres, Axel (Springer, 2009)
    RDF Schema (RDFS) as a lightweight ontology language is gaining popularity and, consequently, tools for scalable RDFS inference and querying are needed. SPARQL has become recently aW3C standard for querying RDF data, ...
  • Embedding non-ground logic programs into autoepistemic logic for knowledge base combination 

    Polleres, Axel (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 ...
  • Enabling Trust and Privacy on the Social Web 

    Passant, Alexandre; Hausenblas, Michael; Polleres, Axel; Decker, Stefan (2009)
  • Entailment for Domain-restricted RDF 

    Polleres, Axel (Springer, 2008)
    We introduce domain-restricted RDF (dRDF) which allows to associate an RDF graph with a fixed, finite domain that interpretations for it may range over. We show that dRDF is a real extension of RDF and discuss impacts on ...
  • A Formal Investigation of Semantic Interoperability of HCLS Systems 

    Sahay. Ratnesh; Zimmermann, Antoine; Fox, Ronan; Polleres, Axel; Hauswirth, Manfred (IGI Global, 2013-06)
    Semantic interoperability facilitates Health Care and Life Sciences (HCLS) systems in connecting stakeholders at various levels as well as ensuring seamless use of healthcare resources. Their scope ranges from local to ...
  • Heterogeneity and Context in Semantic-Web-Enabled HCLS Systems 

    Zimmermann, Antoine; Sahay, Ratnesh; Fox, Ronan; Polleres, Axel (Springer, 2009)
    The need for semantics preserving integration of complex data has been widely recognized in the healthcare domain. While standards such as Health Level Seven (HL7) have been developed in this direction, they have mostly ...
  • 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 ...
  • Integrating Social Networks and Sensor Networks 

    Breslin, John; Decker, Stefan; Hauswirth, Manfred; Hynes, Gearoid; Phuoc, Danh Le; Passant, Alexandre; Polleres, Axel; Rabsch, Cornelius; Reynolds, Vinny (2009)
  • A Logical Framework for Web Service Discovery 

    Polleres, Axel; Keller, Uwe; Fensel, Dieter (IEEE, 2004)
    Current technologies for Web Services are based on syntactical descriptions and, therefore, lend themselves to only limited amount of automation. Research efforts in Semantic Web Services, such as WSMO, try to overcome ...
  • A Methodological Approach for Ontologising and Aligning Health Level Seven Applications 

    Sahay, Ratnesh; Fox, Ronan; Polleres, Axel; Hauswrith, Manfred (2011-05)
    Healthcare applications are complex in the way data and schemas are organised in their internal systems. Widely deployed healthcare standards like Health Level Seven (HL7) V2 are designed using exible schemas which allow ...
  • Modeling services for the semantic grid 

    Polleres, Axel; Fensel, Dieter (2005)
  • On the efficiency of joining group patterns in SPARQL queries 

    Sierra, Javier; Polleres, Axel (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 ...
  • OWL DL vs. OWL Flight: Conceptual Modeling and Reasoning for the Semantic Web 

    Polleres, Axel; Fensel, Dieter (2005)
    The Semantic Web languages RDFS and OWL have been around for some time now. However, the presence of these languages has not brought the breakthrough of the Semantic Web the creators of the languages had hoped for. OWL has ...
  • Previewing Semantic Web Pipes 

    Phuoc, Danh Le; Polleres, Axel; Samwald, Matthias; Tummarello, Giovanni (Springer, 2008)
    In this demo we present a first implementation of Semantic Web Pipes, a powerful tool to build RDF-based mashups. Semantic Web pipes are defined in XML and when executed they fetch RDF graphs on the Web, operate on them, ...
  • Processing ontology alignments with SPARQL 

    Polleres, Axel (IEEE Computer Society, 2008)
  • 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 ...
  • Produce and Consume Linked Data with Drupal! 

    Corlosquet, Stéphane; Delbru, Renaud; Polleres, Axel; Decker, Stefan (Springer, 2009)
    Currently a large number of Web sites are driven by Content Management Systems (CMS) which manage textual and multimedia content but also - inherently - carry valuable information about a site¿s structure and content ...
  • Quantified equilibrium logic and hybrid rules 

    Polleres, Axel (Springer, 2007)
    In the ongoing discussion about combining rules and Ontologies on the Semantic Web a recurring issue is how to combine first-order classical logic with nonmonotonic rule languages. Whereas several modular approaches to de- ...