Conceptual Modeling with OSM

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Conceptual Modeling with OSM

• OSM
• Model (modeling constructs)
• Application model or model instance (actual
  diagram)
• OSM components
• ORM (Object-Relationship Model)
• OBM (Object-Behavior Model)
• OIM (Object-Interaction Model)
• OSM Advantages
• No need to distinguish entities from attributes
• No need to distinguish 11, 1n, and mn
  relationships
• No need to worry about weak entity sets, compound
  attributes, or multivalued attributes
• OSM Disadvantages
• Diagrams tend to be larger than with some
  notations (but high-level abstractions can, in
  principle, shrink diagram size)
• Not commercial (but available for free)

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Objects and Relationships
3
Object and Relationship Sets
4
Sample Application Model
5
Generalization/Specialization
6
Roles
(template)
7
Aggregation
(Template)
8
High-LevelObject and Relationship Sets
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Allegro