In building a logical data model, some entities are considered strong, other entities are considered weak. Strong entities are the most foundational elements within a nascent Entity-Relationship ...

This is a preview. Log in through your library . Abstract A longstanding debate in the data modeling literature pertains to whether the grammars used to generate conceptual schemas should sustain a ...

Occasionally one sees an entity-relationship diagram (ERD) having an unusual characteristic. The unusual element is an entity (or more than one) that seems to have a relationship with every other ...