Cardinality
OPM supports cardinality constraints, meaning a way to indicate to what extent two objects can relate to each other. In OPM these constraints are called participation constraints. The following constraints can be formulated:
- 1 to 1
- 1 to many
- 1 to fixed number
- many to many
- fixed number to fixed number
- Optional (expressed as: ?)
Read more about this topic: Object Process Methodology