On the satisfiability of dependency constraints in entity-relationship schemata
Information Systems
Conceptual modelling of database applications using an extended ER model
Data & Knowledge Engineering
Fundamentals of database systems (2nd ed.)
Fundamentals of database systems (2nd ed.)
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
The Higher-Order Entity-Relationship Model and (DB)2
MFDBS '89 Proceedings of the 2nd Symposium on Mathematical Fundamentals of Database Systems
Fundamentals of Cardinality Constraints
ER '92 Proceedings of the 11th International Conference on the Entity-Relationship Approach: Entity-Relationship Approach
Relative Constraints in ER Data Models
ER '93 Proceedings of the 12th International Conference on the Entity-Relationship Approach: Entity-Relationship Approach
On the Consistency of Int-cardinality Constraints
ER '98 Proceedings of the 17th International Conference on Conceptual Modeling
A Taxonomy of Recursive Relationships and Their Structural Validity in ER Modeling
ER '99 Proceedings of the 18th International Conference on Conceptual Modeling
Relational Database Reverse Engineering: Elicitation of Generalization Hierarchies
ER '99 Proceedings of the Workshops on Evolution and Change in Data Management, Reverse Engineering in Information Systems, and the World Wide Web and Conceptual Modeling
| Hi-index | 0.00 |
Conceptual modeling of a system consists of giving a structured form of information in a way it captures, as much as possible, the semantics of real word objects. The most popular conceptual model for designing operational databases is the Entity-Relationship (ER) model. This model has evolved into models for designing object-oriented system in general. However, despite some formalization attempts, most conceptual techniques remain rather informal. Our aim in this paper is to provide a formal algebraic methodology for conceptual modeling. In the paper we apply our methodology to ER-model but we claim that it is applicable for object modeling with a slight modification. We believe that our approach can help designers in schema validation.