ACM SIGMOD Anthology TODS dblp.uni-trier.de

An Extended Owner-Coupled Set Data Model and Predicate Calculus for Database Management.

J. Bradley: An Extended Owner-Coupled Set Data Model and Predicate Calculus for Database Management. ACM Trans. Database Syst. 3(4): 385-416(1978)
@article{DBLP:journals/tods/Bradley78,
  author    = {J. Bradley},
  title     = {An Extended Owner-Coupled Set Data Model and Predicate Calculus
               for Database Management},
  journal   = {ACM Trans. Database Syst.},
  volume    = {3},
  number    = {4},
  year      = {1978},
  pages     = {385-416},
  ee        = {http://doi.acm.org/10.1145/320289.320294, db/journals/tods/Bradley78.html},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}
BibTeX

Abstract

A data model is presented, based on the extension of the concept of a DBTG owner-coupled set to permit static and dynamic sets and a new kind of set referred to as a virtual set. The notion of connection fields is introduced, and it is shown how connection fields may be used to construct derived information bearing set names, and hence permit the specification of (dynamic) sets which are not predeclared in a schema. Virtual sets are shown to reflect the functional dependencies which can exist within a file. A technique which permits the data model to be fully described diagrammatically by extended Bachman diagrams is described. A predicate calculus for manipulation of this data model is presented. Expressions written in this calculus are compared with corresponding expressions in a relational predicate calculus, DSL ALPHA. An argument for the relational completeness of the language is given.

Copyright © 1978 by the ACM, Inc., used by permission. Permission to make digital or hard copies is granted provided that copies are not made or distributed for profit or direct commercial advantage, and that copies show this notice on the first page or initial screen of a display along with the full citation.

Joint ACM SIGMOD / IEEE Computer Society Anthology

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References

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Referenced by

  1. Kazimierz Subieta: Semantics of Query Languages for Network Databases. ACM Trans. Database Syst. 10(3): 347-394(1985)
  2. J. Bradley: Operations Data Bases. VLDB 1978: 164-176
BibTeX
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