Database Systems (TODS)


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ACM Transactions on Database Systems (TODS), Volume 5 Issue 4, Dec. 1980

TODS---the first three years (1976--1978)
David K. Hsiao
Pages: 385-403
DOI: 10.1145/320610.320611

Decompositions and functional dependencies in relations
W. W. Armstrong, C. Deobel
Pages: 404-430
DOI: 10.1145/320610.320620
A general study is made of two basic integrity constraints on relations: functional and multivalued dependencies. The latter are studied via an equivalent concept: decompositions. A model is constructed for any possible combination of functional...

Reliability mechanisms for SDD-1: a system for distributed databases
Micael Hammer, David Shipman
Pages: 431-466
DOI: 10.1145/320610.320621
This paper presents the reliability mechanisms of SDD-1, a prototype distributed database system being developed by the Computer Corporation of America. Reliability algorithms in SDD-1 center around the concept of the Reliable Network (RelNet)....

Security of statistical databases: multidimensional transformation
Jan Schlöer
Pages: 467-492
DOI: 10.1145/320610.320645
Statistical evaluation of databases which contain personal records may entail risks for the confidentiality of the individual records. The risk has increased with the availability of flexible interactive evaluation programs which permit the use...

Spatial management of data
Christopher F. Herot
Pages: 493-513
DOI: 10.1145/320610.320648
Spatial data management is a technique for organizing and retrieving information by positioning it in a graphical data space (GDS). This graphical data space is viewed through a color raster-scan display which enables users to traverse the GDS...