SYSML16 — Constraint [5] should include specializations of Requirement

Constraint [5] states:

"A nested classifier of a class stereotyped by «requirement» must also be stereotyped by «requirement»."

This would seem to stop Requirements from owning Classes stereotyped by specializations of Requirements (for example, ExtendedRequirement from D.2.2 Stereotypes), which seems too limiting. I'd suggest this is reworded to:

"A nested classifier of a class stereotyped by «requirement» must also be stereotyped by «requirement» or one of its specializations"

Fix constraint#5

Fix constraint#5 as suggested, as part of SYSML16-274
revised text:
A nested classifier of a class stereotyped by Requirement or one of its specializations shall also be stereotyped by Requirement or one of its specializations