> >    if ( $arg instance of namespace() ) ...
> >
> >    if ( $item instance of node()
> >           and not($item instance of attribute()
> >                     or $item instance of comment()
> >                     or $item instance of document-node()
> >                     or $item instance of element()
> >                     or $item instance of processing-instruction()
> >                     or $item instance of text() ) ) ...
> >
> 
> Hi Florent,
> 
> A more compact expression giving the same result is:
> 
> 
>     $item intersect $item/../namespace::*
> 

Only works for a namespace node that has a parent.

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