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

  • Stefan Borgwardt
  • Walter Forkel
  • Alisa KovtunovaEmail author
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11784)

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 Open image in new window , 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.

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Stefan Borgwardt
    • 1
  • Walter Forkel
    • 1
  • Alisa Kovtunova
    • 1
    Email author
  1. 1.Chair for Automata TheoryTechnische Universität DresdenDresdenGermany

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