Setting element type multiplicity

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Setting element type multiplicity

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When defining a diagram type, you can also set the multiplicity of each element type.

This means you can say, for example,

only one element of a type can be on the diagram.

that a maximum of 10 elements of another type are allowed

that the modeller must have at least one element of another type.

This can be used to control more of how a user uses a diagram.

Adding multiplicities

To set the multiplicities, just add a normal UML multiplicity to the element-type end of the appropriate connector.

For example, in the 'Diagram #3' process diagram, we can say there MUST be one, and only one, Start Event.