UML22 — Notation sections for TimeObservation and DurationObservation

The Notation sections for TimeObservation and DurationObservation seem inadequate: 1. The syntax for TimeObservation only allows "now" as a TimeExpression, but indicates in the previous sentence that more complex expressions are possible. 2. The syntax for DurationObservation includes the unexplained non-terminal symbol "duration". 3. In the example, figure 321, there are no associations to named elements shown. I assume that these refer to the begin and end of the arrow, but that is not indicated.

This issue has already been considered by prior RTFs and deemed out of scope, per the following discussion previously recorded for this issue:
A proper resolution of this issue depends on changes in progress with respect to the action and activity model. In addition, a more encompassing improvement of the "simple time model" and related concepts is required.
Thus, the resolution of this issue is best considered to be strategic.
Revised Text:
None
Disposition: Closed Out of Scope