Re: [xml] Can I read namespace URIs as regular attributes?

[Michael Ludwig <mlu as-guides com>]

Jianqing Zhang schrieb:
> I'm trying to read all namespace URIs by go through all attributes of
> the root element. Can I read them as regular attributes?

Jianqing,

I don't know the C API, but in general, a parser may have a flag to
turn namespace-awareness on or off.

I'm not sure LibXML2 has this flag, though; namespace-awareness may
be on by default. And in that case, you probably cannot read them as
regular attributes, because they're made available through a different
part of the API.

After coding the following sample in Perl, I'm unsure what the rule is
for namespaces and attributes - because here I can see the namespace
attributes not only using $node->getNamespaces(), but alos using
$node->attributes().

use strict;
use warnings;
use XML::LibXML;
my $parser = XML::LibXML->new;
my $doc = $parser->parse_string(
        q{<Urmel xmlns="urn:urmel" xmlns:milu="urn:milu" x="3"/>});
print "\ngetNamespaces:\n";
print $_->name, "\t", $_->value, "\n"
        for $doc->documentElement->getNamespaces;
print "\nattributes:\n";
print $_->name, "\t", $_->value, "\n"
        for $doc->documentElement->attributes;

milu colinux:~/Werkstatt/perl/xml > perl xml-libxml-ns.pl

getNamespaces:
xmlns   urn:urmel
xmlns:milu      urn:milu

attributes:
x       3
xmlns   urn:urmel
xmlns:milu      urn:milu

--
Michael Ludwig