1:1 Relation

Meaning

A relationship between entities is shown by a Relation. The box with a double-headed arrow stands for a 1:1 Relation, a direct mapping of the elements taking part in that relation..

See also

Relation
1:n Relation
1:n Relation Symbol
1:1 Relation Symbol
Binary Relation (direct connection)
Binary Relation (horizontal & vertical connection)
Curved Binary Relation (horizontal connection)
Curved Binary Relation (vertical connection)