& XSLT * Dominic Mitchell <dom@[...].net>  [2005-10-15 21:45]:
>  A. Pagaltzis wrote:
>  >Well, as I said, it ignores Name completely.
>  
>  What do you think it should do?  I reckon:
>  
>  * Look at LocalName first and then fall back to Name if it's
>  not present (ignoring the prefix on Name).
>  
>  * Look at Prefix first and if not present, divine it from Name.

Well, thatâ??s why I asked if there is any specification about
this. It would be nice if we could avoid having every module
author have to decide how his module should infer missing bits
from other missing bits.

>  I'll have to say that I'm still figuring out what's going on in
>  there. It's certainly given me new respect for the complexity
>  of namespaces.  :-)

Thatâ??s why it should be solved once in the serialiser instead of
over and over in the applicationsâ?¦ :-)

It isnâ??t really *that* difficult (though I donâ??t know how complex
things are in Genx), but itâ??s certainly real easy to screw it up.

>  Could you give me the sequence of events that you're sending so
>  that I can see what's going on?  Thanks.

At the beginning of processing,

	$h-> start_document();
	$h-> start_prefix_mapping( {
        Prefix =>  '',
        NamespaceURI =>  ATOM_NS,
    } );
	$h-> start_element( {
		Name      =>  'feed',
		LocalName =>  'feed',
		Prefix    =>  '',
		NamespaceURI =>  ATOM_NS,
	} );

and then later

    my $element = {
        Name      =>  'div',
        LocalName =>  'div',
        Prefix    =>  '',
        NamespaceURI =>  XHTML_NS,
    };
    $h-> start_prefix_mapping( {
        Prefix =>  '',
        NamespaceURI =>  XHTML_NS,
    } );
    $h-> start_element( $element );
    # ...
    $h-> end_element( $element );
    $h-> end_prefix_mapping( {
        Prefix =>  '',
        NamespaceURI =>  XHTML_NS,
    } );

and itâ??s when I emit the `div`â??s start_element event that
::SAXWriter crashes and burns.

Incidentally I wonder if it the SAX spec (or Perl-SAX spec)
requires those start_prefix_mapping events of if it wouldnâ??t be
the explicit `Prefix` given for the start_element event shouldnâ??t
be enough to cause the serialiser to emit the requisite xmlns
attribute, given that the prefix is currently mapped to a
different namespace than the one given.

Regards,
-- 
#Aristotle
*AUTOLOAD=*_=sub{s/(.*)::(.*)/print$2,(",$\/"," ")[defined wantarray]/e;$1};
&Just-> another->Perl->hacker;
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