A Detailed Comparison of Seven Approaches for the Annotation of Time-Dependent Factual Knowledge in RDF and OWL

Hans-Ulrich Krieger

In: Proceedings of the 10th Joint ACL-ISO Workshop on Interoperable Semantic Annotation (held in conjunction with LREC 2014). ACL-ISO Workshop on Interoperable Semantic Annotation European Language Resources Association 2014.


Representing time-dependent factual knowledge in RDF and OWL has become increasingly important in recent times. Extending OWL relation instances or RDF triples with further temporal arguments is usually realized through new individuals that hide the range arguments of the extended relation. As a result, reasoning and querying with such representations is extremely complex, expensive, and error-prone. In this paper, we discuss several well-known approaches to this problem and present their pros and cons. Three of them are compared in more detail, both on a theoretical and on a practical level. We also present schemata for translating triple-based encodings into general tuples, and vice versa. Concerning query time, our preliminary measurements have shown that a general tuple-based approach can easily outperform triple-based encodings by several orders of magnitude.


isa10.pdf (pdf, 177 KB )

Deutsches Forschungszentrum für Künstliche Intelligenz
German Research Center for Artificial Intelligence