The temporal query language TQuel
ACM Transactions on Database Systems (TODS)
RQL: a declarative query language for RDF
Proceedings of the 11th international conference on World Wide Web
A survey of temporal extensions of description logics
Annals of Mathematics and Artificial Intelligence
Temporal and Real-Time Databases: A Survey
IEEE Transactions on Knowledge and Data Engineering
Temporal Entity-Relationship Models-A Survey
IEEE Transactions on Knowledge and Data Engineering
Temporal Description Logics: A Survey
TIME '08 Proceedings of the 2008 15th International Symposium on Temporal Representation and Reasoning
A Reusable Ontology for Fluents in OWL
Proceedings of the 2006 conference on Formal Ontology in Information Systems: Proceedings of the Fourth International Conference (FOIS 2006)
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Proceedings of the 6th International Conference on Semantic Systems
SOWL: spatio-temporal representation, reasoning and querying over the semantic web
Proceedings of the 6th International Conference on Semantic Systems
Formalization of 2-D spatial ontology and OWL/Protégé realization
Proceedings of the International Workshop on Semantic Web Information Management
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We introduce TOQL, a query language for querying time information in ontologies. TOQL is a high level query language that handles ontologies almost like relational databases. Queries are issued as SQL-like statements involving time (i.e., time points or intervals) or high-level ontology concepts that vary in time. Although independent from TOQL, this work suggests a mechanism for representing time evolving concepts in ontologies based on the four-dimensional perdurantist mechanism. However, TOQL prevents users from being familiar with the representation of time in ontologies. To show proof of concept, an application has been developed that supports translation and execution of TOQL queries on temporal ontologies combined with a reasoning mechanism based on event calculus. A real world temporal ontology is also implemented on which several TOQL example queries are processed and discussed.