UML14 — Issue: Missing role names

Summary: Severity: Minor
Issue: missing role names

Very few of the association roles have names, which are needed for model
interchange.
Here is the convention being considered in XMI for providing those names.
1) Start with the role name.
2) If the role name is missing, use the association name
3) If the association name is missing or a generated name (see xmi6), use the
class name
4) If the name is a duplicate, use the Class name appended with a number,
counting up from 2.

Clarified in UML 1.3 physical model.