Presentation	1999/6/17 Processing Incomplete Information With Dynamic View Algebra Mizuho IWAIHARA,
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Abstract(in English)	Conditional relations consist of tuples which are associated with conditional formula, which describes certain constraints of the tuple. Using conditional relations, it is possible to assign different semantic constraints to each tuple. Therefore conditional relations can be used for integrating databases having heterogeneous semantic constraints. It is also useful for imteractive applications where each user is given a personalized constraint. In the previous report, we proposed the Dynamic View Algebra (DVA) for manipulating conditional relations. In this paper, we show algorithms for processing DVA queries, and we also describe a DVA evaluator and its performance results.
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Keyword(in English)	database / query languae / query processing / semantic constraints / incomplete information
Paper #	DE99-9
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Committee	DE
Conference Date	1999/6/17(1days)
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Paper Information
Registration To	Data Engineering (DE)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Processing Incomplete Information With Dynamic View Algebra
Sub Title (in English)
Keyword(1)	database
Keyword(2)	query languae
Keyword(3)	query processing
Keyword(4)	semantic constraints
Keyword(5)	incomplete information
1st Author's Name	Mizuho IWAIHARA
1st Author's Affiliation	Department of Computer Science and Communication Engineering Kyushu University()
Date	1999/6/17
Paper #	DE99-9
Volume (vol)	vol.99
Number (no)	117
Page	pp.pp.-
#Pages	6
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