An extended owner-coupled set data model and predicate calculus for database management
ACM Transactions on Database Systems (TODS)
On user criteria for data model evaluation
ACM Transactions on Database Systems (TODS)
Relational Data-Base Management Systems
ACM Computing Surveys (CSUR)
CODASYL Data-Base Management Systems
ACM Computing Surveys (CSUR)
Performance prototyping of data management applications
ACM '76 Proceedings of the 1976 annual conference
A high-level data manipulation language for hierarchical data structures
Proceedings of the 1976 conference on Data : Abstraction, definition and structure
IBM Systems Journal
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The time and cost of implementing data processing applications can be greatly reduced through the use of software systems which provide language for the expression of file-level operations on data, i.e., operations whose operands are sets of records or entire files, such as report generation and sorting. Such systems, which have been referred to as self-contained systems or generalized file management systems, have characteristically been restricted to logical data structure classes no richer than hierarchies. This paper explores the extension of the concept of file-level operations to network structures, as exemplified by the CODASYL DDLC data structure class, on the assumption that such a facility will prove useful to certain types of users (e.g., data administrators) for certain types of data manipulation (e.g., data base creation and updating). The paper first outlines the general requirements which must be met in such a facility, and then describes a specific approach to the development of a language for such a facility.