Re: [xml-dev] Abstraction in Science, Mathematics, Software, and Markup

> I think it's fair to say that abstraction is the protogenesis of all
> generic markup....  For that matter, it's a large part, if not the
> main part, or what data modelling (in all forms) is all about.
>

Moreover, it's fundamental to Western philosophical thought starting 
with Aristotle.

Michael Kay
Saxonica