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Ontology
Martin Rezk edited this page Jul 31, 2014
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The ontology contains OWL axioms specifying comprehensive information about the underlying concepts in the dataset. The original ontology was developed at the University of Oslo (Project Link), and it models information concerning the petroleum activities on the Norwegian continental shelf like operating companies and production licences, fields and discoveries, facilities and pipelines, to wellbores and stratigraphic data shelf.
The ontology used in the benchmark is a maximal OWL2 QL subset of the original NPD ontology. The following table shows relevant statistics about the structure of the ontology.
| #classes | #obj_prop | #data_prop | #intensional_axioms | max_depth | avg_siblings |
|---|---|---|---|---|---|
| 343 | 142 | 238 | 1451 | 10 | 4.83 |
- #classes: Number of classes
- #obj_prop: Number of object properties
- #data_prop: Number of data properties
- #intensional_axioms: Number of intensional axioms in the ontology
- max_depth: Maximum length of a chain of rdfs:subClassOf in the ontology
- avg_siblings: Average number of siblings for each class