UML14 — Contents of section "Control Icons" is vague

Summary: The section "Control Icons" in the chapter "Activity Diagrams"
does not follow the layout of the rest of the chapter, and the contents
of the section is (intentionally?) vague. The most important issues,
however, are: figure 58 is incorrect, and the text describing the
control icon stereotypes is inconsistent with the activity model
semantics. The mapping section also contains some peculiarities: signal
sending should not be a RaiseAction but a SendAction, and the dummy
state introduced for the join Pseudostate makes no sense. This entire
section should be corrected and strengthened, and control icons put into
a context.

Redundant with activity diagram rework.