[ubl-ndrsc] SQUIRTS, CCTS feedback and "Primitive Types"

There was an error in the metamodel presented in our CCTS 1.8 feedback (v 5.2).
At the end of section 2 on page 7 we show BCC related to Primitive Type through BCCProperty.
That was wrong because it fails to distinguish the 1-1 relationship between a BCC and it's content component .
A better model is shown here (inline and attached as PDF): In this model we explicitly show the distinguished relationship between BCC and its content component (of meta-class Primitive Type ).
The association role contentComponent captures this special relationship explicitly.
This model retains the BCCProperty to relate the BCC to its supplementary components -- each of which needs to be named in relation to the BCC. Arofan -- do I understand SQUIRTS right, that a SQUIRT is essentially what I've shown as a PrimitiveType in the diagram.
So that's two issues:
1. we added an association directly from BCC to PrimitiveType for the content component
2. we might need to change the metaclass PrimitiveType to SQUIRT Thoughts?
-Bill Attachment: Visio-Lonely Metamodel 5-2-1.pdf Description: Binary data