Across
- 2. Structure formed by generalization/specialization
- 4. Represents a "has-a" relationship
- 5. General entity in a hierarchy
- 9. Combining entities into a super-entity
- 11. All instances must be in relationship
- 12. Sub-entity gets attributes from super-entity
- 13. Derived entity in specialization
- 14. Some instances may not be involved
Down
- 1. Process of defining sub-entities
- 3. Stronger form of aggregation
- 6. Rules applied on entities or relationships
- 7. Sub-entities can share instances
- 8. Indicates entity’s involvement in a relationship
- 10. Rule that sub-entities do not overlap
- 12. Relationship between subclass and superclass