Abstract
Using ontologies for enterprise data integration brings an opportunity to use them for efficient data query evaluation. The rationale is that ontologies represent common-sense structures that are reflected also in queries posed by data users and thus can be used for query optimization. This paper presents how proper foundational-ontology-based knowledge can be used to design a generic index, which can help in answering a wide range of queries compliant with the foundational ontology. We discuss several indexing techniques and evaluate our proposal for different UFO-based queries extracted from different query sets.
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Notes
- 1.
http://ogp.me, accessed 2018-07-16.
- 2.
https://tinyurl.com/g-knowledge-graph, accessed 2018-07-16.
- 3.
https://tinyurl.com/ms-concept-graph, accessed 2018-07-16.
- 4.
E.g. http://rdf4j.org/, cit. 16.7.2018, or https://virtuoso.openlinksw.com/, cit. 16.7.2018, to list some.
- 5.
The figure is a straightforward visualization of a fragment of UFO axiomatization in OWL, e.g. \( \textsf {Trope} \sqsubseteq \forall \textsf {inheresIn} \cdot \textsf {Individual} \sqcap \exists \textsf {inheresIn} \cdot \textsf {Individual} \) denotes the edge from \( \textsf {Trope} \) to \( \textsf {Individual} \). See [4] for details.
- 6.
We reuse Description Logic formalization of basic UFO concepts introduced in [4].
- 7.
For the purpose of this paper, we consider constant to be URIs only.
- 8.
\( \textsf {rdf:type} \) is a special predicate of RDF denoting instantiation.
- 9.
We use the prefix “:” to denote the namespace <http://example.org/>, thus a translation of Agent into its RDF representation would be an IRI <http://example.org/Agent>.
- 10.
https://wiki.scn.sap.com/wiki/display/SD/Customer+master+data, cit. 16.07.2018.
- 11.
E.g. http://www.adrm.com/ba-customer-service.shtml, cit. 16.07.2018.
- 12.
- 13.
https://github.com/kbss-cvut/reporting-tool, cit. 16.07.2018.
- 14.
Common SPARQL prefixes include rdfs: to denote http://www.w3.org/2000/01/rdf-schema, rdf: to denote http://www.w3.org/1999/02/22-rdf-syntax-ns, ufo: to denote http://onto.fel.cvut.cz/ontologies/ufo/ and aviation-safety: to denote http://onto.fel.cvut.cz/ontologies/aviation-safety/.
- 15.
E.g. http://rdf4j.org/, cit. 16.7.2018.
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Acknowledgments
This work was supported by grant No. GA 16-09713S Efficient Exploration of Linked Data Cloud of the Grant Agency of the Czech Republic and by grant No. SGS16/229/OHK3/3T/13 Supporting ontological data quality in information systems of the Czech Technical University in Prague.
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Ahmad, J., Křemen, P., Ledvinka, M. (2018). Optimization of Queries Based on Foundational Ontologies. In: Panetto, H., Debruyne, C., Proper, H., Ardagna, C., Roman, D., Meersman, R. (eds) On the Move to Meaningful Internet Systems. OTM 2018 Conferences. OTM 2018. Lecture Notes in Computer Science(), vol 11230. Springer, Cham. https://doi.org/10.1007/978-3-030-02671-4_22
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