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Abstract

Semantic data modelling has been a traditional abstract way of
representing data and relationships between data for database systems.
Recently database designers and developers have been looking to object
oriented modelling methods which incorporate the modelling of
behaviour as well as data and their relationships.
Databases can also be considered to be functional structures. All
operations on databases are functional in that they return values.
Transaction and update operations return a new version of the database;
queries return values contained in the database; and reports return values
from the database in some strictly formatted form.
This thesis firstly develops an extended version of the Entity-Relationship
model, called the Entity-Relationship-Object model (ERO model) that
incorporates object oriented concepts including behaviour. Secondly, a
methodology is defined for mapping this model directly to the functional. .
programming language, Haskell, where all Entity and Relationship objects
are implemented as abstract data types and all attributes and methods are
implemented as functions.
The modularity and polymorphism of the proposed models and their
implementation allow for easy schema extension and modification. Lazy
evaluation in the implementation allows for a simple form of persistent
data store.

Item Type:	Thesis - Unspecified
Authors/Creators:	Dawson, Linda Louise
Keywords:	Object-oriented databases, Haskell (Computer program language)
Copyright Holders:	The Author
Copyright Information:	Copyright 1993 the Author - The University is continuing to endeavour to trace the copyright owner(s) and in the meantime this item has been reproduced here in good faith. We would be pleased to hear from the copyright owner(s).
Additional Information:	Thesis (M.Sc.)--University of Tasmania, 1995. Includes bibliographical references (p. 76-78)
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