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http://hdl.handle.net/1942/20633
Title: | Deciding Confluence for a Simple Class of Relational Transducer Networks | Authors: | AMELOOT, Tom VAN DEN BUSSCHE, Jan |
Issue Date: | 2015 | Publisher: | SPRINGER | Source: | THEORY OF COMPUTING SYSTEMS, 57 (4), p. 1038-1111 | Abstract: | Networks of relational transducers can serve as a formal model for declarative networking, focusing on distributed database querying applications. In declarative networking, a crucial property is eventual consistency, meaning that the final output does not depend on the message delays and reorderings caused by the network. Here, we formalize eventual consistency as a confluence notion, meaning that finite executions of the system can always be extended to yield the desired output. We show that confluence is decidable when the transducers satisfy some syntactic restrictions, some of which have also been considered in earlier work on automated verification of relational transducers. This simple class of transducer networks computes exactly all distributed queries expressible by unions of conjunctive queries with negation. | Notes: | [Ameloot, Tom J.; Van den Bussche, Jan] Hasselt Univ, Hasselt, Belgium. [Ameloot, Tom J.; Van den Bussche, Jan] Transnat Univ Limburg, Hasselt, Belgium. | Keywords: | relational transducer; eventual consistency; confluence; decidability; conjunctive query;Relational transducer; Eventual consistency; Confluence; Decidability; Conjunctive query | Document URI: | http://hdl.handle.net/1942/20633 | ISSN: | 1432-4350 | e-ISSN: | 1433-0490 | DOI: | 10.1007/s00224-015-9624-6 | ISI #: | 000365792200008 | Rights: | © Springer Science+Business Media New York 2015 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2016 |
Appears in Collections: | Research publications |
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