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Showing papers by "Ramez Elmasri published in 1988"


Proceedings ArticleDOI
05 Dec 1988
TL;DR: This paper presents an approach to database integration which supports updates and which uses only the standard relational data model, and many of the ideas used are applicable in the context of other data models as well.
Abstract: Most work on database integration has considered only support for data retrieval, not support for updates, and often the use of a special semantically rich data model has been required. In this paper we present an approach to database integration which supports updates and which uses only the standard relational data model. Many of the ideas used in this approach are applicable to database integration in the context of other data models as well.

21 citations


Proceedings ArticleDOI
01 Feb 1988
TL;DR: The semantics of update operations for the ECR model are discussed in this paper, where the proposed update operations can be implemented as an interactive data manipulation language based on algebraic operators.
Abstract: The Entity-Category-Relationship (ECR) model extends the Entity-Relationship (ER) model with the concepts of subclass and generalisation categories. In this paper semantics of update operations for the ECR model are discussed. The proposed update operations can be implemented as an interactive data manipulation language. This language is based on algebraic operators that can be invoked graphically to operate on ECR diagrams. A method of implementing the graphical ECR interface for accessing relational database systems is proposed.

8 citations