LibXML misbehaving with default namespace

Emmanuel Rodriguez <[email protected]> Thu, 23 Oct 2008 19:34:31 +0200
Newsgroups	gmane.comp.lang.perl.xml
Message-ID	<[email protected]>
Hi,

I've encountered a strange behavior from XML::LibXML when parsing a 
default namespace. I made a small proof-of-concept script that can 
demonstrate the problem. Sample script:

#!/usr/bin/perl

use strict;
use warnings;

use XML::LibXML qw(:all);
use Data::Dumper;

# Which libxml?   
printf "libxml compiled version %s\n", XML::LibXML::LIBXML_VERSION;
printf "libxml runtime  version %s\n", XML::LibXML::LIBXML_RUNTIME_VERSION;
printf "libxml version %s\n", XML::LibXML::LIBXML_DOTTED_VERSION;
print "XML::LibXML version $XML::LibXML::VERSION\n";

my $parser = XML::LibXML->new();
my $document = $parser->parse_string('<html 
xmlns="http://www.w3.org/1999/xhtml"/>');

# Print the namespaces
my ($namespace) = $document->documentElement->getNamespaces;
foreach my $namespace ($document->documentElement->getNamespaces) {
    my $uri = $namespace->getNamespaceURI;
    my $prefix = $namespace->getPrefix || 'undef';
    print "$prefix => $uri\n";
}

The output of this script differers based on the version of 
LibXML/libxml installed. At home I have the following results:
    libxml compiled version 20630
    libxml runtime  version 20631
    libxml version 2.6.30
    XML::LibXML version 1.63
    undef => http://www.w3.org/1999/xhtml

And at work I get:
    libxml compiled version 20627
    libxml runtime  version 20631
    libxml version 2.6.27
    XML::LibXML version 1.66
    xmlns => http://www.w3.org/2000/xmlns/

Anyone noticed this?

Emmanuel Rodriguez

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