Sciweavers

4335 search results - page 63 / 867
» Ontology Engineering Relationally
Sort
View
ESWS
2008
Springer
13 years 11 months ago
Mapping Validation by Probabilistic Reasoning
In the semantic web environment, where several independent ontologies are used in order to describe knowledge and data, ontologies have to be aligned by defining mappings among the...
Silvana Castano, Alfio Ferrara, Davide Lorusso, To...
DEXAW
2008
IEEE
185views Database» more  DEXAW 2008»
14 years 4 months ago
Axiom-Based Feedback Cycle for Relation Extraction in Ontology Learning from Text
—The ontology learning from text cycle consists of the consecutive phases of term, synonym, concept, taxonomy and relation extraction. In this paper, a proposal towards the unsup...
Witold Abramowicz, Maria Vargas-Vera, Marek Wisnie...
OTM
2005
Springer
14 years 3 months ago
Probabilistic Ontologies and Relational Databases
The relational algebra and calculus do not take the semantics of terms into account when answering queries. As a consequence, not all tuples that should be returned in response to ...
Octavian Udrea, Yu Deng, Edward Hung, V. S. Subrah...
IAT
2008
IEEE
14 years 4 months ago
Exploiting Hyponymy in Extracting Relations and Enhancing Ontologies
Relation extraction systems typically rely on local lexical and syntactic features as evidence. Recent work suggests that for a given relation, there might exist certain patterns ...
Bhushan Mandhani, Stephen Soderland
AAAI
2012
12 years 9 days ago
Ontological Smoothing for Relation Extraction with Minimal Supervision
Relation extraction, the process of converting natural language text into structured knowledge, is increasingly important. Most successful techniques use supervised machine learni...
Congle Zhang, Raphael Hoffmann, Daniel S. Weld