CHRONOS: A reasoning engine for qualitative temporal information in OWL

Eleftherios Anagnostopoulos, Sotiris Batsakis, Euripides G.M. Petrakis

Research output: Contribution to journalConference articlepeer-review

30 Citations (Scopus)


We propose CHRONOS, a system for reasoning over temporal information in OWL ontologies. Representing both qualitative temporal (i.e., information whose temporal extents are unknown such as "before", "after" for temporal relations) in addition to quantitative information (i.e., where temporal information is defined precisely e.g., using dates) is a distinctive feature of the proposed approach. Qualitative representations are very common in natural language expressions such as in free text or speech and can be proven to be valuable in the Semantic Web. CHRONOS reasoner applies over temporal relations in order to infer implied relations and to detect inconsistencies while retaining soundness, completeness and tractability over the supported relations set. The experimental results demonstrated that CHRONOS runs up to several times faster compared to its SWRL counterpart and scales-up well for large relation sets.

Original languageEnglish
Pages (from-to)70-77
Number of pages8
JournalProcedia Computer Science
Publication statusPublished - 1 Jan 2013
Externally publishedYes
Event17th International Conference on Knowledge Based and Intelligent Information and Engineering Systems - Kitakyushu, Japan
Duration: 9 Sep 201311 Sep 2013
Conference number: 17 (Link to Conference Website)


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