Issue 17845: What is a DurationConstaint (uml25-ftf)
Source: Nomos Software (Dr. Edward Willink, ed(at)willink.me.uk)
Nature: Clarification
Severity: Significant
Summary: I've read the description of firstEvent four times and I still do not understand it. Rewrite so there is a simple if/else that avoids the need to do detailed comparison between two very similar sentences.

Suggest:

A DurationConstraint is a Constraint that refers to a DurationInterval. which may be the interval between execution entering and  exiting a single constrained element, or between selectable enter/exit events on a pair of constrained elements.

...
When there are two constrainedElements, firstEvent[i] is true to select the enter, or false to select the exit event for execution of the corresponding constrainedElement. 

Resolution: 
Revised Text: 
Actions taken:
September 26, 2012: received issue
Discussion: 

End of Annotations:=====
s is issue # 17845

Problem: 8.035

Severity: Medium
Type: Clarification
Location: 8.6 p 86 DurationConstraint
Title: What is a DurationConstaint
Description:
I've read the description of firstEvent four times and I still do not understand it. Rewrite so there is a simple if/else that avoids the need to do detailed comparison between two very similar sentences.
 
Suggest:
 
A DurationConstraint is a Constraint that refers to a DurationInterval. which may be the interval between execution entering and  exiting a single constrained element, or between selectable enter/exit events on a pair of constrained elements.
 
...
When there are two constrainedElements, firstEvent[i] is true to select the enter, or false to select the exit event for execution of the corresponding constrainedElement. 
 
Source: Edward Willink