RE: XML Implementation spec

[Bob Haugen <linkage@interaccess.com>]

Ernie Nishiseki wrote:
>Attached is a first draft of the XML Implementation Methodology
>specification.


Question:  in this document, Buyer and Seller are subclasses
of Party.  Is this the way the core component for Party will be
designed (I hadn't noticed it in other documents), or is that just 
an example of how to implement subclasses?

To put a point on the question, how could the same Party
be a Buyer in one exchange and a Seller in another,
if Buyer and Seller are subclasses?

Thanks,