planning - designing - developing IT
Special Interest Group on Systems Analysis and Design

ACM Transactions on Database Systems 

A new normal form for nested relations

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We consider nested relations whose schemes are structured as trees, called scheme trees, and introduce a normal form for...

Physical database design for relational databases

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This paper describes the concepts used in the implementation of DBDSGN, an experimental physical design tool for relational databases...

An improved third normal form for relational databases

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In this paper, we show that some Codd third normal form relations may contain “superfluous” attributes because the definitions...

An information-theoretic analysis of worst-case redundancy in database design

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Normal forms that guide the process of database schema design have several key goals such as elimination of redundancies...

A normal form for relational databases that is based on domains and keys

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A new normal form for relational databases, called domain-key normal form (DK/NF), is defined. Also, formal definitions of insertion...

A graph-theoretic approach to map conceptual designs to XML schemas

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We propose a mapping from a database conceptual design to a schema for XML that produces highly connected and...

Multivalued dependencies and a new normal form for relational databases

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A new type of dependency, which includes the well-known functional dependencies as a special case, is defined for relational...

Conceptual schema analysis: techniques and applications

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The problem of analyzing and classifying conceptual schemas is becomig increasingly important due to the availability of a large...

Representing extended entity-relationship structures in relational databases: a modular approach

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A common approach to database design is to describe the structures and constraints of the database application in terms...

Hierarchical schemata for relational databases

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Most database design methods for the relational model produce a flat database, that is, a family of relations with...