Question on CCTs vs Data Types

Mary Kay and Alan,

We (the OASIS/ebXML Registry Core Components Review SC) have a question
on CCTs vs Data Types that we hope you can answer for us, as I don't
believe the answer is clear from the CCTS (or I have misinterpreted the
CCTS):

Is an entity named "Country_Code" a CCT or a Data Type? I interpret it
as a CCT.

More details:

- According to Gunther's CCT document (XML representations), I believe
that Country_Code would be considered a CCT. 

- The issue underlying the question is that the CCTS lists multiple
Supplementary Component attributes (code list ID, agency, etc.) which -
I believe - would need to be tied to a specific code list (such as
"Country_Code") rather than a generic CCT called "Code. Type". 

- I'm sure how/why we would register a generic CCT called "Code. Type" -
i.e. what values would the attributes (code list ID, agency, etc.) have? 

- So a more "specific" Country_Code - e.g. European_Country_Code - would
be a Data Type (not a CCT), which restricts the CCT called
"Country_Code" to inlcude only those codes from European countries.

Thanks in advance for your help,
Joe Chiusano and the Core Components Review SC