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- Relationships represented by connecting lines, labels and arrows
- Association (solid line between instances) or Aggregation (solid line with diamond (empty or full) between whole and part) occasionally directed, labelled, and with multiplicities and role names
- Dependency (dashed line, possibly directed and occasionally with a label)
- Generalisation (solid line with hollow arrowhead pointing to the parent)
- Realization (dashed line with hollow arrowhead, e.g., between interfaces and the classes that realize them and between use cases and collaborations that realize them)
Ananda Amatya
11/3/1999