Publikation
A General Methodology for Equipping Ontologies With Time
Hans-Ulrich Krieger
In: 7th International Conference on Language Resources and Evaluation. International Conference on Language Resources and Evaluation (LREC-2010), ELRA, 2010.
Zusammenfassung
In the first part of this paper, we present a framework for enriching
arbitrary upper or domain-specific ontologies with a concept
of time. To do so, we need the notion of a time slice.
Contrary to other approaches, we directly interpret the original
entities as time slices in order to (i) avoid a duplication of the
original ontology and (ii) to prevent a knowledge engineer from
ontology rewriting.
The diachronic representation of time is complemented by a
sophisticated time ontology that supports underspecification and
an arbitrarily fine granularity of time.
As a showcase, we describe how the time ontology has been
interfaced with the PROTON upper ontology.
The second part investigates a temporal extension of RDF
that replaces the usual triple notation by a more general tuple
representation. In this setting, Hayes/ter Horst-like entailment
rules are replaced by their temporal counterparts.
Our motivation to move towards this direction is twofold:
firstly, extending binary relation instances with time leads to a
massive proliferation of useless objects (independently of the
encoding); secondly, reasoning and querying with such extended
relations is extremely complex, expensive, and error-prone.