NDLI: Modeling datalog fact assertion and retraction in linear logic

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Modeling datalog fact assertion and retraction in linear logic

Content Provider	ACM Digital Library
Author	Lam, Edmund Soon Lee Cervesato, Iliano
Abstract	Practical algorithms have been proposed to efficiently recompute the logical consequences of a Datalog program after a new fact has been asserted or retracted. This is essential in a dynamic setting where facts are frequently added and removed. Yet while assertion is logically well understood as incremental inference, the monotonic nature of first-order logic is ill-suited to model retraction. As such, the traditional logical interpretation of Datalog offers at most an abstract specification of Datalog systems, but has tenuous relations to the algorithms that perform efficient assertions and retractions in practical implementations. This paper proposes a logical interpretation of Datalog based on linear logic. It not only captures the meaning of Datalog updates, but also provides an operational model that underlies the dynamic changes of the set of inferable facts, all within the confines of logic. We prove the correctness of this interpretation with respect to its traditional counterpart.
Starting Page	67
Ending Page	78
Page Count	12
File Format	PDF
ISBN	9781450315227
DOI	10.1145/2370776.2370786
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2012-09-19
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Linear logic Retraction Datalog Assertion
Content Type	Text
Resource Type	Article

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