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in reply to Re^2: How to parse xml with namespase vale in XMl:LibXML? (xmllint --shell setns / xpathtester)
in thread How to parse xml with namespase value in XMl:LibXML?

But when I am trying to access the nodes as below I don't get any value. 
print $chapter_node->findvalue('./book:locator/@xlink:href') . "\n";

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Could you please elaborate a bit or point out where I am committing mistake?
  • Comment on Re^3: How to parse xml with namespase vale in XMl:LibXML? (xmllint --shell setns / xpathtester)
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Re^4: How to parse xml with namespase vale in XMl:LibXML? (xmllint --shell setns / xpathtester)
by choroba (Cardinal) on Jul 08, 2013 at 12:19 UTC
    Works for me: 
    #!/usr/bin/perl
use warnings;
use strict;

use XML::LibXML;

my $xml  = XML::LibXML->load_xml(IO => *DATA);
my $root = $xml->documentElement;
my $chapter_node = $root->findnodes('book:chapter')->[0];
print $chapter_node->findvalue('./book:locator/@*') . "\n";

__DATA__
<book xmlns:book='b'> <!-- Namespace definition missing in the origina
+l data -->
<book:chapter id="bk444444ch1" type="CHAPTER">
<book:locator xlink:href="/book/isbn/979-0-4444-1000-17/book-part/chap
+ter/bk444444ch1?releaseStatus=RELEASED" xlink:title="Photonic crystal
+ light-emitting sources" xlink:type="locator" xmlns:xlink="http://www
+.w3.org/1999/xlink"/>
<book:locator xlink:href="/book/isbn/979-0-4444-1000-17/book-part/chap
+ter/bk444444ch1?releaseStatus=RELEASED&amp;format=pdf" xlink:title="P
+hotonic crystal light-emitting sources" xlink:type="locator" xmlns:xl
+ink="http://www.w3.org/1999/xlink"/>
<book:locator xlink:href="/book/isbn/979-0-4444-1000-17/book-part/chap
+ter/bk444444ch1?releaseStatus=RELEASED&amp;format=epub" xlink:title="
+Photonic crystal light-emitting sources" xlink:type="locator" xmlns:x
+link="http://www.w3.org/1999/xlink"/>
</book:chapter> <!-- Missing in the original data -->
</book>

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    Note the changes I made to your data. Maybe your $chapter_node contains something else?

    لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ
[reply]
[d/l]
      Hi Choroba,

      Thanks a lot and sorry for being stupid. Actually, my objective was to get values of "xlink:href" and "xlink:title" for first occurrence of "book:locator" in Xpath context.

      Any hint or tweak on that?
[reply]
        To use namespaces in the full depth, use XML::LibXML::XPathContext: 
        #!/usr/bin/perl
use warnings;
use strict;

use XML::LibXML;

my $xpc  = XML::LibXML::XPathContext->new();
my $xml  = XML::LibXML->load_xml(IO => *DATA);
my $root = $xml->documentElement;
$xpc->registerNs('xlink', 'http://www.w3.org/1999/xlink');
my $chapter_node = $xpc->findnodes('book:chapter', $root)->[0];
print $xpc->findvalue('book:locator/@xlink:title | book:locator/@xlink
+:href', $chapter_node) . "\n";

        [download]
        لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ
[reply]
[d/l]
Re^4: How to parse xml with namespase vale in XMl:LibXML? (xmllint --shell setns / xpathtester)
by Anonymous Monk on Jul 08, 2013 at 13:38 UTC

    Could you please elaborate a bit or point out where I am committing mistake?

    Well, no, you don't show self-contained code . I guess that you didn't read my nodes and setup xpc with some setns, but I don't really have any way of knowing; also, I hate xml

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