Summary of Conceptual Design
Conceptual design follows requirements analysis,
- Yields a high-level description of data to be stored
ER model popular for conceptual design
- Constructs are expressive, close to the way people think about their applications.
Basic constructs: entities, relationships, and attributes (of entities and relationships).
Some additional constructs: weak entities, ISA hierarchies, and aggregation.
Note: There are many variations on ER model.