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[Submitted on 3 Mar 2024 (v1), last revised 1 Jul 2026 (this ver · 2024-03-04 · via cs.DB updates on arXiv.org

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Abstract:In this paper we define a new algorithm to convert an input relational database to an output set of RDF triples. The algorithm can be used to e.g. load CSV data into a financial OWL ontology such as FIBO. The algorithm takes as input a set of relational conjunctive (select-from-where) queries, one for each input table; the source of each query is the three column (subject, predicate, object) RDF schema and the target of each query is the corresponding input table's relational schema. The algorithm's output is the only set of RDF triples for which a unique ``round-trip'' of the input data under the relational queries exists. The output may contain blank nodes, is unique up to unique isomorphism, and can be obtained using elementary formal methods (equational theorem proving and term model construction specifically). We also describe how (generalized) homomorphisms between graphs can be used to write such relational conjunctive (select-from-where) queries, which, due to the lack of structure in the three-column RDF schema, tend to be large in practice. We demonstrate examples of both the algorithm and mapping language on the FIBO financial ontology.

Submission history

From: Ryan Wisnesky [view email]
[v1] Sun, 3 Mar 2024 22:29:58 UTC (835 KB)
[v2] Wed, 1 Jul 2026 19:40:30 UTC (581 KB)