The Binary Relation
(direct connection) shows that two entity
sets are connected to it take part in a relation.
This shape consists of the relation and two edges for simple use. Note: A direct connection shall be avoided whenever possible. To maintain a comprehensive layout one should always prefer horizontal or vertical connections. |
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The context menu lets you set the type of the Binary Relation.
n:m Relation - The relation box will become empty. You are encouraged to add the cardinalities in this case. | ||
1:n Relation - This results in an arrow. | ||
n:1 Relation - The same as 1:n Relation, just the arrow will point in the other direction. | ||
1:1 Relation - This results in a double-headed arrow. |
Binary
Relation (horizontal & vertical connection)
Curved
Binary Relation (horizontal connection)
Curved
Binary Relation (vertical connection)