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Grammars as Models
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Reference Relationships
The Notation in a Nutshell
The Distinction between Composition and Reference
The Scope Concept
Many-Many Relationships and Their Avoidance
Representing Graphs
Context and Relationship Scope
Diagrams Expressing Scopes
Further examples
Disambiguation
Scope Squares - A Warning
Blog
Duality Diagram
Foundations of Data
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Number in Entity Modelling
Relational Data Design
Wrapping Up
Reference Relationships
Entity Modelling Tutorial Part Two - Reference Relationships and Relationship Scope
This chapter is a tutorial on reference relationships and on the important concept of relationship scope.
The Notation in a Nutshell
The Distinction between Composition and Reference
The Scope Concept
Many-Many Relationships and Their Avoidance
Representing Graphs
Context and Relationship Scope
Diagrams Expressing Scopes
Further examples
Disambiguation
Scope Squares - A Warning