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Conceptual schema and relational database design: a fact oriented approach
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Extending object-oriented systems with roles
ACM Transactions on Information Systems (TOIS)
Conceptual schema and relational database design (2nd ed.)
Conceptual schema and relational database design (2nd ed.)
Analysis patterns: reusable objects models
Analysis patterns: reusable objects models
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
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Representing roles and purpose
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Entity-Relationship Modeling: Foundations of Database Technology
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ICDE '97 Proceedings of the Thirteenth International Conference on Data Engineering
An Object Data Model with Roles
VLDB '93 Proceedings of the 19th International Conference on Very Large Data Bases
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ECOOP '95 Proceedings of the 9th European Conference on Object-Oriented Programming
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CAiSE '02 Proceedings of the 14th International Conference on Advanced Information Systems Engineering
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ER '97 Proceedings of the 16th International Conference on Conceptual Modeling
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The VLDB Journal — The International Journal on Very Large Data Bases
The description logic handbook
A role model and its metaclass implementation
Information Systems
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VLDB '77 Proceedings of the third international conference on Very large data bases - Volume 3
ER'00 Proceedings of the 19th international conference on Conceptual modeling
A radical revision of UML's role concept
UML'00 Proceedings of the 3rd international conference on The unified modeling language: advancing the standard
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PPPJ '06 Proceedings of the 4th international symposium on Principles and practice of programming in Java
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REFSQ '08 Proceedings of the 14th international conference on Requirements Engineering: Foundation for Software Quality
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Advances in Software Engineering
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MODELS'07 Proceedings of the 10th international conference on Model Driven Engineering Languages and Systems
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Roles are meant to capture dynamic and temporal aspects of real-world objects. The role concept has been used with many semantic meanings: dynamic class, aspect, perspective, interface or mode. This paper identifies common semantics of different role models found in the literature. Moreover, it presents a set of conceptual modelling patterns for the role concept that include both the static and dynamic aspects of roles. In particular, we propose the Role as Entity Types conceptual modelling pattern to deal with the full role semantics. A conceptual modelling pattern is aimed at representing a specific structure of knowledge that appears in different domains. The use of these patterns eases the definition of roles in conceptual schemas. In addition, we describe the design of schemas defined by using the patterns in order to implement them in any object-oriented language.