3 years ago

The Window Validity Problem in Rule-Based Stream Reasoning.

Alessandro Ronca, Mark Kaminski, Bernardo Cuenca Grau, Ian Horrocks

Rule-based temporal query languages provide the expressive power and flexibility required to capture in a natural way complex analysis tasks over streaming data. Stream processing applications, however, typically require near real-time response using limited resources. In particular, it becomes essential that the underpinning query language has favourable computational properties and that stream processing algorithms are able to keep only a small number of previously received facts in memory at any point in time without sacrificing correctness. In this paper, we propose a recursive fragment of temporal Datalog with tractable data complexity and study the properties of a generic stream reasoning algorithm for this fragment. We focus on the window validity problem as a way to minimise the number of time points for which the stream reasoning algorithm needs to keep data in memory at any point in time.

Publisher URL: http://arxiv.org/abs/1808.02291

DOI: arXiv:1808.02291v3

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