NDLI: Efficient maintenance techniques for views over active documents

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Interactive query refinement

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Efficient maintenance techniques for views over active documents

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Efficient maintenance techniques for views over active documents

Content Provider	ACM Digital Library
Author	Abiteboul, Serge Marinoiu, Bogdan Bourhis, Pierre
Abstract	Many Web applications are based on dynamic interactions between Web components exchanging flows of information. Such a situation arises for instance in mashup systems or when monitoring distributed autonomous systems. Our work is in this challenging context that has generated recently a lot of attention; see Web 2.0. We introduce the axlog formal model for capturing such interactions and show how this model can be supported efficiently. The central component is the axlog widget defined by one tree-pattern query or more, over an active document (in the Active XML style) that includes some input streams of updates. A widget generates a stream of updates for each query, the updates that are needed to maintain the view corresponding to the query. We exploit an array of known technologies: datalog optimization techniques such as Differential or MagicSet, constraint query languages, and efficient XML filtering (YFilter). The novel optimization technique we propose is based on fundamental new notions: a relevance (different than that of MagicSet), satisfiability and provenance for active documents. We briefly discuss an implementation of an axlog engine, an application that we used to test the approach, and results of experiments.
Starting Page	1076
Ending Page	1087
Page Count	12
File Format	PDF
ISBN	9781605584225
DOI	10.1145/1516360.1516483
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2009-03-24
Publisher Place	New York
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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