An introduction to database systems: vol. I (4th ed.)
An introduction to database systems: vol. I (4th ed.)
Data models, database languages and database management systems
Data models, database languages and database management systems
Designing quality databases with IDEF1X information models
Designing quality databases with IDEF1X information models
The design of relational databases
The design of relational databases
Object-oriented analysis and design with applications (2nd ed.)
Object-oriented analysis and design with applications (2nd ed.)
ERL: logic for entity-relationship databases
Journal of Intelligent Information Systems
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
Information Systems
An Introduction to Information Engineering: From Strategic Planning to Information Systems
An Introduction to Information Engineering: From Strategic Planning to Information Systems
Information Engineering: Introduction
Information Engineering: Introduction
Essentials of Management Information Systems: Organization and Technology
Essentials of Management Information Systems: Organization and Technology
DOOD '95 Proceedings of the Fourth International Conference on Deductive and Object-Oriented Databases
Identification, Genericity and Consistency in Object-Oriented Databases
ICDT '92 Proceedings of the 4th International Conference on Database Theory
A Declarative Query Approach to Object Identification
OOER '95 Proceedings of the 14th International Conference on Object-Oriented and Entity-Relationship Modelling
Value Based Identification and Functional Dependencies for Object Databases
BIWIT '97 Proceedings of the 3rd Basque International Workshop on Information Technology (BIWIT '97)
Comparative Evaluation of Large Data Model Representation Methods: The Analyst's Perspective
ER '02 Proceedings of the 21st International Conference on Conceptual Modeling
Entity relationship stored procedure meta language
AIC'07 Proceedings of the 7th Conference on 7th WSEAS International Conference on Applied Informatics and Communications - Volume 7
Business process management with unified modeling language
DNCOCO'06 Proceedings of the 5th WSEAS international conference on Data networks, communications and computers
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The ER model is the most popular model for database modeling. Its popularity is based on simple graphical representations, on graphical extensibility of given design and last but not least on safe constructs. The model strength is its strict hierarchic structure. This basis leads to safe implementations. There has been a large number of different extensions to the ER model both consistent and well-based or intuitive and seldom well-based. In this paper we demonstrate a safe path to extended ER models. Meanwhile object-oriented model have gained large attention. Most of the object-oriented models are based on very powerful constructs which cannot be safely implemented. Some of the models are based on ER constructs with the extension of methods. We show that this approach is safe and powerful.