Pharos: Query-Driven Schema Inference for the Semantic Web

Haller D, Lenz R (2020)

Publication Language: English

Publication Type: Conference contribution, Original article

Publication year: 2020

Publisher: Springer

City/Town: Cham

Pages Range: 112--124

Conference Proceedings Title: Machine Learning and Knowledge Discovery in Databases: International Workshops of ECML PKDD 2019, Würzburg, Germany, September 16--20, 2019, Proceedings, Part II

Event location: Würzburg DE

ISBN: 978-3-030-43887-6

URI: https://link.springer.com/chapter/10.1007/978-3-030-43887-6_10

DOI: 10.1007/978-3-030-43887-6_10

Abstract

The practical advantage of a data lake depends on the semantic understanding of its data. This knowledge is usually not externalized, but present in the minds of the data analysts who have used a great deal of cognitive effort to understand the semantic relationships of the heterogeneous data sources. The SQL queries they have written contain this hidden knowledge and should therefore serve as the foundation for a self-learning system. This paper proposes a methodology for extracting knowledge fragments from SQL queries and representing them in an RDF-based knowledge graph. The feasibility of this approach is demonstrated by a prototype implementation and evaluated using example data. It is shown that a query-driven knowledge graph is an appropriate tool to approximate the semantics of the data contained in a data lake and to incrementally provide interactive feedback to data analysts to help them with the formulation of queries.

Authors with CRIS profile

David Haller Chair for Computer Science 6 (Data Management) Richard Lenz Professur für evolutionäres Datenmanagement

Related research project(s)

Processing Heterogeneous Assets and Resources to discover Ontologies and Semantics (PHAROS) June 1, 2019 - June 1, 2022

How to cite

APA:

Haller, D., & Lenz, R. (2020). Pharos: Query-Driven Schema Inference for the Semantic Web. In Machine Learning and Knowledge Discovery in Databases: International Workshops of ECML PKDD 2019, Würzburg, Germany, September 16--20, 2019, Proceedings, Part II (pp. 112--124). Würzburg, DE: Cham: Springer.

MLA:

Haller, David, and Richard Lenz. "Pharos: Query-Driven Schema Inference for the Semantic Web." Proceedings of the International Workshops of ECML PKDD 2019, Würzburg Cham: Springer, 2020. 112--124.

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