Evolution of Business System Analysis Techniques
ACM Computing Surveys (CSUR)
A relational model of data for large shared data banks
Communications of the ACM
An information algebra: phase 1 report—language structure group of the CODASYL development committee
Communications of the ACM
ACM '68 Proceedings of the 1968 23rd ACM national conference
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Items in business systems have to be identified by reference codes, which can later be used as data codes and file keys in an associated data processing system. In business systems associated with large collections of integrated files (databases) it is vital to assign codes in a methodical way so as to control future extension and changes while maintaining correct program action. The principles of methodical coding are discussed, and the way in which logical connections between data items must be reflected in the reference code framework is shown through a set-theoretic information model.