SYSML16 — Association arrowheads should not be forbidden

The SysML specification excludes the usage of association arrowheads:

"The use of navigation arrowheads on an association has been simplified by excluding the case of arrowheads on both ends, and requiring that such an association always be shown without arrowheads on either end." (8.3.1.3, SysML 1.5).

However, arrowheads are commonly used in SysML modeling. There are also examples of usages in the SysML specification itself, for example, figure D.15.

Association arrowheads at both ends at the same time are forbidden

The specification only excludes the case of arrowheads at both ends of an association at the same time. The modeling scenarios mentioned by the reporter are still possible in SysML.