When using the Crow's Foot notation, the associative entity is indicated by solid relationship lines between the parents and the associative entity
- In the Crow's Foot diagram, physical entities are represented by boxes while the lines between the boxes denotes relationships.
- A physical entity refers to a real-world object such as:
- Place.
- Person.
- Car.
- Tree.
- Furthermore, a physical entity is typically represented with a rectangle containing the physical entity's name in the Crow's Foot notations.
- Also, solid relationship lines are used to indicate the associative entity with respect to the relationship between the parents and the associative entity
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