Supporting pruning in tabled LP

Chico de Guzmán, Pablo, Hermenegildo, Manuel V. ORCID: and Carro Liñares, Manuel ORCID: (2013). Supporting pruning in tabled LP. In: "15th International Symposium, PADL 2013", 21-22 Jan 2013, Roma, Italia. ISBN 978-3-642-45283-3. pp. 60-76.


Title: Supporting pruning in tabled LP
Item Type: Presentation at Congress or Conference (Unspecified)
Event Title: 15th International Symposium, PADL 2013
Event Dates: 21-22 Jan 2013
Event Location: Roma, Italia
Title of Book: Practical Aspects of Declarative Languages
Título de Revista/Publicación: Practical Aspects of Declarative Languages
Date: 2013
ISBN: 978-3-642-45283-3
ISSN: 978-3-642-45283-3
Volume: 7752
Freetext Keywords: Logic Programming; Tabling; Pruning; Performance
Faculty: E.T.S. de Ingenieros Informáticos (UPM)
Department: Lenguajes y Sistemas Informáticos e Ingeniería del Software
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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This paper analyzes issues which appear when supporting pruning operators in tabled LP. A version of the once/1 control predicate tailored for tabled predicates is presented, and an implementation analyzed and evaluated. Using once/1 with answer-on-demand strategies makes it possible to avoid computing unneeded solutions for problems which can benefit from tabled LP but in which only a single solution is needed, such as model checking and planning. The proposed version of once/1 is also directly applicable to the efficient implementation of other optimizations, such as early completion, cut-fail loops (to, e.g., prune at the top level), if-then-else, and constraint-based branch-and-bound optimization. Although once/1 still presents open issues such as dependencies of tabled solutions on program history, our experimental evaluation confirms that it provides an arbitrarily large efficiency improvement in several application areas.

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Item ID: 29547
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Deposited by: Memoria Investigacion
Deposited on: 24 Jul 2014 11:43
Last Modified: 23 Nov 2017 10:29
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