XML namespaces

corfuitl has asked for the wisdom of the Perl Monks concerning the following question:

Hi perlmonks

It seems that my code is not able to parse this XML because of the "xmlns="urn:foo:names:tc:doc:document:1.2""

I tried to use registerNs but no luck :(

Could you please help me on this?

Here is the XML

<?xml version="1.0" encoding="UTF-8"?>
<doc version="1.2" xmlns="urn:foo:names:tc:doc:document:1.2" xmlns:okp
+="ok-fr:doc-extensions" xmlns:its="http://www.w3.org/2015/1115/its" x
+mlns:itsxlf="http://www.w3.org/do/its-doc/" its:version="2.0">

<body>
</body>
<body>
<node id="NFDBB2FA9-tu1" xml:space="preserve">
<node1>TEXT 1"</node1>
</node>
</body>

</doc>
[download]

And here is my code

use XML::LibXML;


my $dom = 'XML::LibXML'->load_xml(IO => *STDIN);


foreach my $tu ($dom->findnodes('/doc/body/node')) {
    for my $node ($tu->findnodes('node1')) {
        print "$node\n";
    }
    
}
[download]

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Replies are listed 'Best First'.
Re: XML namespaces by haukex (Bishop) on Jul 24, 2018 at 16:33 UTC
I tried to use registerNs but no luck :( When you use XML::LibXML::XPathContext, remember to call `findnodes` on that object for the namespaces to take effect. The following works fine for me (output "`<node1>TEXT 1"</node1>`") for your example file. Note how I'm passing the context of the second `findnodes` call as the second argument, and I adjusted your XPath expressions to use the namespace, since it applies to all nodes in the document. `use warnings; use strict; use XML::LibXML; my $doc = XML::LibXML->load_xml( location => '/tmp/foo.xml' ); my $xpc = XML::LibXML::XPathContext->new($doc); $xpc->registerNs('foo', 'urn:foo:names:tc:doc:document:1.2'); foreach my $tu ($xpc->findnodes('/foo:doc/foo:body/foo:node')) { for my $node ($xpc->findnodes('foo:node1', $tu)) { print "$node\n"; } }` [download]	[reply] [d/l] [select]
Re: XML namespaces by Corion (Pope) on Jul 24, 2018 at 16:22 UTC
You don't tell us what error message you get or how you used `->registerNs` to register your namespace. I've used XML::LibXML with namespaces and `->findnodes` and I'm fairly certain that they work. Maybe the problem is your XPath expression - `doc` is different from `foo:doc`, if `foo` is the namespace `urn:foo:names:tc:doc:document:1.2` where the `doc` element lives in. Maybe changing your XPath query to the following will make things work if you specify the namespaces for each node not in th edefault namespace: `/foo:doc/body/node` [download]	[reply] [d/l] [select]


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