RE: [XML Schema 1.1] Does mode="none" on a subtype nullify the openness of its parent type?

> > if the base type allows open content, then a type derived 
> from it by 
> > extension must also allow open content.
> 
> Now I'm really confused.
> 
> What value is mode="none"?
> 
> I thought that the point of mode="none" was to enable a 
> subtype to "turn off" the openness of its parent type? If 
> this is not the case, then what value is mode="none"?

You can turn off the open content when deriving by restriction, but not when
deriving by extension.

Makes sense really - restriction can only reduce the permitted content,
extension can only increase it.

Regards,

Michael Kay
http://www.saxonica.com/
http://twitter.com/michaelhkay