Re: List and union varieties

Hi, Henry,

Specs are really confusing sometimes.. :)

By definition of atomic datatype (2.5.1.1 Atomic datatypes):
"atomic datatypes can be either primitive or derived. "

Further, list/union are both derived datatypes (according to datatypes
specs)

So why would specs say smth like:

> > http://www.w3.org/TR/xmlschema-2/#derivation-by-list says
> > A list datatype must be derived from an atomic or a list datatype, 

Does not "atomic" mean it can include either union or list? 
Why would you specifically mention "atomic or list" instead of just
"atomic"? 

Thanks, 
Elena