[glue-wg] DENY rules

[Laurence Field]

> I don't think there is a current usage, hence the discussion ...
>   
We should try to avoid this kind of things as much as possible. We 
should not try to propose solutions for use cases we have no experience 
and put it directly into the spec. If this is important for Nordugrid 
(or EGEE), we should extent the schema and evaluate the solutions on our 
own infrastructures before proposing the solution to Glue.  As this is a 
syntax on and attribute, it should only really affect the document 
rather than the schema implementation. 

Focusing on issues like this will distract and slow us down for the rest 
that we do have experience on.

Laurence