The entity-relationship model—toward a unified view of data
ACM Transactions on Database Systems (TODS) - Special issue: papers from the international conference on very large data bases: September 22–24, 1975, Framingham, MA
Database abstractions: aggregation and generalization
ACM Transactions on Database Systems (TODS)
CODASYL Data-Base Management Systems
ACM Computing Surveys (CSUR)
Database abstractions: aggregation
Communications of the ACM
A relational model of data for large shared data banks
Communications of the ACM
Systems for Large Data Bases
The entity-relationship model: a basis for the enterprise view of data
AFIPS '77 Proceedings of the June 13-16, 1977, national computer conference
New perspectives for information systems education
AFIPS '77 Proceedings of the June 13-16, 1977, national computer conference
Views, authorization, and locking in a relational data base system
AFIPS '75 Proceedings of the May 19-22, 1975, national computer conference and exposition
Trends in database management: 1975
AFIPS '75 Proceedings of the May 19-22, 1975, national computer conference and exposition
| Hi-index | 0.00 |
The features of the Entity-Relationship model are examined, as a means for representing both the conceptual schema and the external schema in a database system. In order to serve in this dual capacity, its modelling features are extended to support multiple user views. We show how to represent a model and present a suitable diagrammatic technique. To represent these concepts at the user level we propose a data definition language with a concise and simple structure. Furthermore, guidelines are given for interfacing the E-E-R schema with existing DBTG-like systems.