Metamodel user guide
All elements participating in the process sequencing logic are Flow elements. Artifacts define subsidiary elements such as notes, groups or associations.
|Defines whether or not the Association shows any directionality with an arrowhead. The default is None (no arrowhead). A value of One means that the arrowhead SHALL be at the Target Object. A value of Both means that there SHALL be an arrowhead at both ends of the Association line.|