parsing xml having multiple namespaces using xml::Libxml::Xpathcontext in perl

Question

I have to parse following XML:

<reply xmlns="urn::ietf::param" xmlns:element="https://xml.example.net/abc/12.3"
message-id='1'>
<abc>
<xyz> hello </xyz>
</abc>
</reply>

I want the value of xyz node i.e. hello, but findnodes is returning null value. my code is :

 my $xpath=XML::LibXML::XPathContext->new($dom);
    $xpath->registerNs('ns1','urn::ietf::param'); 
    $xpath->registerNs('ns2','https://xml.example.net/abc/12.3');
    $val=$xpath->findnodes('//ns1:reply/ns2:element/abc/xyz'); 
    print $val;

but print statement is returning null value

dirkk · Accepted Answer · 2014-04-08 12:13:17Z

2

It looks like you have some misunderstanding about how namespaces work. xmlns:element="https://xml.example.net/abc/12.3" means that there is a prefix element defined with this specific namespace URI. This namespace is actually never used in your XML.

xmlns="urn::ietf::param" defines a default namespaces and also applies to all descendant elements. And actually you have no <element/> element in your XML.

Thus, the following XPath should work as expected:

//ns1:reply/ns1:abc/ns1:xyz

answered Apr 8, 2014 at 12:13

dirkk

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