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» The Limits of Querying Ontologies
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SAC
2010
ACM
15 years 8 months ago
Web-based graphical querying of databases through an ontology: the Wonder system
Biological scientists have made large amounts of data available on the Web, which can be accessed by canned or precomputed queries presented via web forms. To satisfy further info...
Diego Calvanese, C. Maria Keet, Werner Nutt, Maria...
IIR
2010
15 years 2 months ago
An Ontological Representation of Documents and Queries for Information Retrieval Systems
This paper presents a vector space model approach, for representing documents and queries, using concepts instead of terms and WordNet as a light ontology. This way, information o...
Mauro Dragoni, Célia da Costa Pereira, Andr...
OWLED
2007
15 years 2 months ago
On Querying Ontologies with Contextual Logic Programming
Abstract. We describe a system in which Contextual Logic Programming is used as a mediator for knowledge modeled by ontologies. Our system provides the components required to behav...
Cláudio Fernandes, Nuno Lopes 0002, Salvado...
DLOG
2011
14 years 4 months ago
Module Extraction via Query Inseparability in OWL 2 QL
We show that deciding conjunctive query inseparability for OWL 2 QL ontologies is PSpace-hard and in ExpTime. We give polynomial-time (incomplete) algorithms and demonstrate by exp...
Boris Konev, Roman Kontchakov, Michel Ludwig, Thom...
ESWS
2007
Springer
15 years 5 months ago
Imprecise SPARQL: Towards a Unified Framework for Similarity-Based Semantic Web Tasks
This proposal explores a unified framework to solve Semantic Web tasks that often require similarity measures, such as RDF retrieval, ontology alignment, and semantic service match...
Christoph Kiefer