Well-founded semantics coincides with three-valued stable semantics
Fundamenta Informaticae
The well-founded semantics for general logic programs
Journal of the ACM (JACM)
Fixpoint semantics for logic programming a survey
Theoretical Computer Science
A uniform approach to logic programming semantics
Theory and Practice of Logic Programming
From SPARQL to rules (and back)
Proceedings of the 16th international conference on World Wide Web
Proceedings of the 17th international conference on World Wide Web
Trust on the world wide web: a survey
Foundations and Trends in Web Science
Social network-based trust in prioritized default logic
AAAI'06 proceedings of the 21st national conference on Artificial intelligence - Volume 2
Trust-based Revision for Expressive Web Syndication
Journal of Logic and Computation
A caching mechanism for semantic web service discovery
ISWC'07/ASWC'07 Proceedings of the 6th international The semantic web and 2nd Asian conference on Asian semantic web conference
A framework for handling inconsistency in changing ontologies
ISWC'05 Proceedings of the 4th international conference on The Semantic Web
Semantic similarity based ontology cache
APWeb'06 Proceedings of the 8th Asia-Pacific Web conference on Frontiers of WWW Research and Development
ISWC '09 Proceedings of the 8th International Semantic Web Conference
AnQL: SPARQLing up annotated RDFS
ISWC'10 Proceedings of the 9th international semantic web conference on The semantic web - Volume Part I
Using provenance to debug changing ontologies
Web Semantics: Science, Services and Agents on the World Wide Web
A general framework for representing, reasoning and querying with annotated Semantic Web data
Web Semantics: Science, Services and Agents on the World Wide Web
Context-dependent views to axioms and consequences of Semantic Web ontologies
Web Semantics: Science, Services and Agents on the World Wide Web
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The Semantic Web is a distributed environment for knowledge representation and reasoning. The distributed nature brings with it failing data sources and inconsistencies between autonomous knowledge bases. To reduce problems resulting from unavailable sources and to improve performance, caching can be used. Caches, however, raise new problems of imprecise or outdated information. We propose to distinguish between certain and cached information when reasoning on the semantic web, by extending the well known $\mathcal{FOUR}$ bilattice of truth and knowledge orders to $\mathcal{FOUR-C}$, taking into account cached information. We discuss how users can be offered additional information about the reliability of inferred information, based on the availability of the corresponding information sources. We then extend the framework towards $\mathcal{FOUR-T}$, allowing for multiple levels of trust on data sources. In this extended setting, knowledge about trust in information sources can be used to compute, how well an inferred statement can be trusted and to resolve inconsistencies arising from connecting multiple data sources. We redefine the stable model and well founded semantics on the basis of $\mathcal{FOUR-T}$, and reformalize the Web Ontology Language OWL2 based on logical bilattices, to augment OWL knowledge bases with trust based reasoning.