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Materialisation facilitates Datalog reasoning by precomputing all consequences of the facts and the rules so that queries can be directly answered over the materialised facts. However, storing all materialised facts may be infeasible in practice, especially when the rules are complex and the given set of facts is large. We observe that for certain combinations of rules, there exist data structures that compactly represent the reasoning result and can be efficiently queried when necessary. In this paper, we present a general framework that allows for the integration of such optimised storage schemes with standard materialisation algorithms. Moreover, we devise optimised storage schemes targeting at transitive rules and union rules, two types of (combination of) rules that commonly occur in practice. Our experimental evaluation shows that our approach significantly improves memory consumption, sometimes by orders of magnitude, while remaining competitive in terms of query answering time. |
The linux executables are available here and are explained as follows.
[1] Hu, Pan, Boris Motik, and Ian Horrocks. "Modular materialisation of datalog programs." Artificial Intelligence 308 (2022): 103726. |
The test datasets and Datalog programs used in our paper are available here.
The data description is shown below:
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Xinyue Zhang, Pan Hu, Yavor Nenov, Ian Horrocks. Optimised Storage for Datalog Reasoning. In AAAI, 2024. camera ready |
@inproceedings{zhang2024optimised,
  title={Optimised Storage for Datalog Reasoning},   author={Zhang, Xinyue and Hu, Pan and Nenov, Yavor and Horrocks, Ian},   booktitle={The 38th Annual AAAI Conference on Artificial Intelligence},   year={2024} } |
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