Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Schulz, S; Schober, D; Tudose, I; Stenzhorn, H.
The Pitfalls of Thesaurus Ontologization - the Case of the NCI Thesaurus.
AMIA Annu Symp Proc. 2010; 2010(18):727-731
[OPEN ACCESS]
PubMed
- Führende Autor*innen der Med Uni Graz
- Schulz Stefan
- Altmetrics:
- Dimensions Citations:
- Plum Analytics:
- Abstract:
- Thesauri that are "ontologized" into OWL-DL semantics are highly amenable to modeling errors resulting from falsely interpreting existential restrictions. We investigated the OWL-DL representation of the NCI Thesaurus (NCIT) in order to assess the correctness of existential restrictions. A random sample of 354 axioms using the someValuesFrom operator was taken. According to a rating performed by two domain experts, roughly half of these examples, and in consequence more than 76,000 axioms in the OWL-DL version, make incorrect assertions if interpreted according to description logics semantics. These axioms therefore constitute a huge source for unintended models, rendering most logic-based reasoning unreliable. After identifying typical error patterns we discuss some possible improvements. Our recommendation is to either amend the problematic axioms in the OWL-DL formalization or to consider some less strict representational format.