Logical Data Modelling
Objectives
What is a Logical Data Model?
What do Logical Data Structures Consist of ?
What is an Entity/Entity Type ?
Features of Entity Types
PPT Slide
What is a Relationship Type ?
Recursive Relationships
Resolving M:M Recursive Relationships
Mutually Exclusive Relationships
Exclusive Ownership
Exclusive Membership
Types of 1:M Relationships
Owner Mandatory : Member Mandatory
Owner Optional : Member Optional
Owner Mandatory : Member Optional
Entity/Event Modelling
What is an Entity/Event Model?
What do Entity Life Histories Consist of?
What is an Event?
Types of Event
What is an Effect?
Structural Components
Sequence
Selection
Iteration
Parallelism
Complete Example
Email: tdhutchi@glam.ac.uk
Home Page: www.comp.glam.ac.uk\pages\staff\tdhutchings
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