Journal of the ACM (JACM)
The system for business automation (SBA): programming language
Communications of the ACM
Principles of Database Systems
Principles of Database Systems
Remarks on the algebra of non first normal form relations
PODS '82 Proceedings of the 1st ACM SIGACT-SIGMOD symposium on Principles of database systems
Data Structures for an Integrated Data Base Management and Information Retrieval System
VLDB '82 Proceedings of the 8th International Conference on Very Large Data Bases
An extension of relational algebra for summary tables
SSDBM'83 Proceedings of the 2nd international workshop on Proceedings of the Second International Workshop on Statistical Database Management
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Most users of micro-computers are not professionally trained in computer science and many are in occupations where a form or table is a common way of collecting and maintaining information. The form-based systems and the non-normal form database systems address this interface area, but each has its own limitations either in terms of complexity or applicability or both. A user interface system designed for use on a personal computer, which avoids the limitations of previous systems, has been designed. This paper describes a user interface system which provides for the use of a screen image of a table or form, allows for the creation, storage and manipulation of data in a database which is relational in logical structure through the screen image of the tables or form, and avoids the limitations previously mentioned. The mappings required to move screen images expressed as set relations to the relations in the normalized database are the focus of this paper.