Role arrow

How to add a Role arrow

See Adding arrow-type elements.

Interpretation

Role arrows join submodels that participate in some form of association, or where one is a satellite of the other. The following sections detail the mathematical methods invoked by the role arrow. In each case, a multi-dimensional matrix is created containing instances of the submodel at the head of the role arrow. The dimensions of the matrix depend on the number of role arrows used, and the different uses are therefore described in separate sections.

• one role arrow
• two role arrows from different submodels
• two role arrows from the same submodel

Rules

• A role arrow can only be drawn between two submodels, one representing the object that plays a role in an association, and the other representing the association itself.
• Role arrows cannot be added in such a way that they form a loop.

In: Contents >> Graphical Modelling >> Object/agent based