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Communications of the ACM
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EDBT '94 Proceedings of the 4th international conference on extending database technology: Advances in database technology
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PODS '99 Proceedings of the eighteenth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
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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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The VLDB Journal — The International Journal on Very Large Data Bases
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VLDB '94 Proceedings of the 20th International Conference on Very Large Data Bases
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VLDB '95 Proceedings of the 21th International Conference on Very Large Data Bases
Euro-Par '97 Proceedings of the Third International Euro-Par Conference on Parallel Processing
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The Classification Abstraction is a fundamental concept supporting the existence of database systems. However, it has been seldom supported as a database modeling element. This paper presents a technic to support classification as a semantic constructor, enabling its representation in target modeling. It is also shown that this concept can unify the commands for data definition and data manipulation in query languages, thus generating tight environments including the data model, the database management system and the software design techniques. Through classification, object types and object instances can be treated in a uniform manner, allowing the unification of concepts and commands. This approach is illustrated using the SIRIUS model and its schema editor. SIRIUS data model is a full featured, abstraction-based data model, including a semantic constructor based on the classification abstraction that supports the concepts presented here.