Database Systems (TODS)


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ACM Transactions on Database Systems (TODS), Volume 13 Issue 2, June 1988

Fuzzy functional dependencies and lossless join decomposition of fuzzy relational database systems
K. V. S. V. N. Raju, Arun K. Majumdar
Pages: 129-166
DOI: 10.1145/42338.42344
This paper deals with the application of fuzzy logic in a relational database environment with the objective of capturing more meaning of the data. It is shown that with suitable interpretations for the fuzzy membership functions, a fuzzy...

A model-based approach to updating databases with incomplete information
Marianne Winslett
Pages: 167-196
DOI: 10.1145/42338.42386
Suppose one wishes to construct, use, and maintain a database of facts about the real world, even though the state of that world is only partially known. In the artificial intelligence domain, this problem arises when an agent has a base set of...

Database concurrency control using data flow graphs
M. H. Eich, David L. Wells
Pages: 197-227
DOI: 10.1145/42338.42345
A specialized data flow graph, Database Flow Graph (DBFG) is introduced. DBFGs may be used for scheduling database operations, particularly in an MIMD database machine environment. A DBFG explicitly maintains...