Now showing items 1-15 of 15

  • 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 ...
  • 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, ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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- ...
  • SAOR: Authoritative Reasoning for the Web 

    Hogan, Aidan; Harth, Andreas; Polleres, Axel (Springer, 2008)
    In this paper we discuss the challenges of performing reasoning on large scale RDF datasets from the Web. We discuss issues and practical solutions relating to reasoning over web data using a rule-based approach to ...
  • SPARQL++ for mapping between RDF vocabularies 

    Polleres, Axel (Springer, 2007)
    Lightweight ontologies in the formof RDF vocabularies such as SIOC, FOAF, vCard, etc. are increasingly being used and exported by ¿serious¿ applications recently. Such vocabularies, together with query languages like SPARQL ...
  • Towards Intelligent web Services: Web Service Modeling Ontology (WSMO) 

    Polleres, Axel; Fensel, Dieter (Springer, 2005)
    The SemanticWeb and the SemanticWeb Services build a natural application area for Intelligent Agents, namely querying and reasoning about structured knowledge and semantic descriptions of services and their interfaces on ...
  • WWW or What Is Wrong with Web Services 

    Polleres, Axel; Bussler, Christoph; Fensel, Dieter (IEEE, 2005)
    A core paradigm of the Web is information exchange via persistent publication, i.e., one party publishes a piece of information on the Web, and any other party who knows the location of the resource can retrieve and process ...
  • XSPARQL: Traveling between the XML and RDF worlds - and avoiding the XSLT pilgrimage 

    Akhtar, Waseem; Krennwallner, Thomas; Polleres, Axel (Springer, 2008)
    With currently available tools and languages, translating between an existing XML format and RDF is a tedious and error-prone task. The importance of this problem is acknowledged by the W3C GRDDL working group who faces ...