Conceptual schema and relational database design - a fact oriented approach
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منابع مشابه
Modeling Collections in UML and ORM
Collection types such as sets, bags and arrays have been used as data structures in both traditional and object oriented programming. Although sets were used as record components in early database work, this practice was largely discontinued with the widespread adoption of relational databases. Object-relational and object databases once again allow database designers to embed collections as da...
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Themost common way of designing databases is by means of a conceptual model, such as E/R, without taking into account other views of the system. New object-oriented design languages, such as UML (Unified Modelling Language), allow the whole system, including the database schema, to be modelled in a uniform way. Moreover, as UML is an extendable language, it allows for any necessary introduction...
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This paper reports on the usage of graph grammar theory and systems for building the Varlet database reverse engineering environment. The Varlet environment supports analysis of legacy relational database systems, translation of the relational schema into a conceptual object-oriented schema, interactive enhancement of the conceptual schema and translation of relational data into the resulting o...
متن کاملFormal design and implementation of an improved DDBJ DNA database with a new schema and object-oriented library
MOTIVATION The DNA Data Bank of Japan (DDBJ) has developed a new DNA database system with a new schema design to accommodate rapid change and growth of requirements on the system. RESULTS The new schema and systems were created using an object-oriented design approach. The design was accomplished in accordance with ANSI/SPARC three-level schema architecture. First, the conceptual schema was d...
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تاریخ انتشار 1989