Mutually Exclusive Relationships - Reduced Arc

In some diagrams only one of the Mutually Exclusive Relationships may be present, the other, being not applicable to the diagram, being omitted.

For example, a particular diagram is concerned with SERVICE REQUESTS and requires the inclusion of CARE PROFESSIONAL ORGANISATION, however, the second Mutually Exclusive Relationship to ORGANISATION is not relevant to the diagram and can be left out.

This omission is indicated by the straight line (arc) which normally spans the two Relationships being displayed in a reduced manner.

An example of a Reduced Mutually Exclusive Relationship Arc in diagrams is given below: