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Finding New Diamonds: Temporal Minimal-World Query Answering over Sparse ABoxes

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Abstract

Lightweight temporal ontology languages have become a very active field of research in recent years. Many real-world applications, like processing electronic health records (EHRs), inherently contain a temporal dimension, and require efficient reasoning algorithms. Moreover, since medical data is not recorded on a regular basis, reasoners must deal with sparse data with potentially large temporal gaps. In this paper, we introduce a temporal extension of the tractable language , which features a new class of convex diamond operators that can be used to bridge temporal gaps. We develop a completion algorithm for our logic, which shows that entailment remains tractable. Based on this, we develop a minimal-world semantics for answering metric temporal conjunctive queries with negation. We show that query answering is combined first-order rewritable, and hence in polynomial time in data complexity.

This work was partially supported by DFG grant 389792660 as part of TRR 248 and the DFG project BA 1122/19-1 (GOASQ).

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Notes

  1. 1.

    https://clinicaltrials.gov/ct2/show/NCT02280564.

  2. 2.

    https://clinicaltrials.gov/ct2/show/NCT02873052.

  3. 3.

    https://clinicaltrials.gov/ct2/show/NCT02157311.

  4. 4.

    https://clinicaltrials.gov/ct2/show/NCT00969735.

  5. 5.

    https://www.snomed.org/.

  6. 6.

    https://clinicaltrials.gov/ct2/show/NCT01198002.

  7. 7.

    Strictly speaking, \(\psi _\mathcal {T}\) in [12] is a set of first-order formulas, which is however equivalent to the disjunction of all these formulas.

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Correspondence to Alisa Kovtunova .

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Borgwardt, S., Forkel, W., Kovtunova, A. (2019). Finding New Diamonds: Temporal Minimal-World Query Answering over Sparse ABoxes. In: Fodor, P., Montali, M., Calvanese, D., Roman, D. (eds) Rules and Reasoning. RuleML+RR 2019. Lecture Notes in Computer Science(), vol 11784. Springer, Cham. https://doi.org/10.1007/978-3-030-31095-0_1

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