NDLI: An exploration of relationships among exclusive disjunctive data

Content Provider	IEEE Xplore Digital Library
Author	Jui-Shang Chiu Chen, A.L.P.
Copyright Year	1989
Abstract	We elaborate on how to interpret the query answer on exclusive disjunctive databases and how to reduce the query answer into a more concise form. Exclusive disjunctive data are represented as a pair of value set and variable set in Pv-table which is an extension of the relational model. A value set corresponds to a finite set of possible values in which exactly one value is the true value. By variable sets, tuples may be related with certain relationships, namely disjunctive relationship and join relationship. Three kinds of tuple sets are classified according to these relationships, each possesses an important property, namely co-exist, co-nonempty, or co-instance. Based on these properties, the interpretation of Pv-tables can be formalized in a semantically meaningful way, Also, the redundant and mergeable tuples can be identified. After removing and merging tuples accordingly, a more concise Pv-table can thus provide a better understanding of the query result.
Sponsorship	IEEE IEEE Comput. Soc. Tech. Committee on Data Eng IEEE Computer Society
Starting Page	928
Ending Page	940
Page Count	13
File Size	1623705
File Format	PDF
ISSN	10414347
Volume Number	7
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relational databases Computer Society Merging Database languages Computer science
Content Type	Text
Resource Type	Article
Subject	Information Systems Computational Theory and Mathematics Computer Science Applications

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