p:use-when on non-XProc elements

Hi,

The section 3.9 (Conditional Element Inclusion) in the latest Editor's
Draft says that:

"The semantics of a p:use-when attribute on an element not in the XProc
namespace are the same as the semantics of a use-when attribute on an
element in the XProc namespace."

I may be wrong, but somehow I thought we decided that p:use-when would
have no special meaning on non-XProc elements?

Regards,
Vojtech