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XML::LibXML and Xpath syntax How do I get attribute of sibling

Posted on 2016-08-15
  • Perl
  • XML
  • Scripting Languages
  • Programming Languages-Other
  • Shell Scripting
  • +1
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Last Modified: 2016-08-21
This is follow on fromThis Question

In the xml bellow I need to locate the next 'link' after I've located 'images' within the parent 'entry'


I found this link that suggest can use "following-sibling" can someone see what I've  done wrong?  

note I've striped the xml down to simplify

Perl script
 
!C:\strawberry\perl\bin\perl.exe

use strict;
use warnings;
use XML::LibXML;
use XML::LibXML::XPathContext;
use Data::Dump qw(dump);


my $filename = 'georss.xml';

my $dom = XML::LibXML->load_xml(location => $filename);
my $xpc = XML::LibXML::XPathContext->new($dom);
$xpc->registerNs(dft => "http://www.w3.org/2005/Atom");
$xpc->registerNs(georss => "http://www.georss.org/georss");


foreach my $Entry ($xpc->findnodes("//dft:feed/dft:entry")) {

     foreach my $Images ($xpc->findnodes("/dft:title[not(\@type='text')]", $Entry)) {
         my $ImageVal = $Images->textContent;

          ####  This finds all the Images
         print "ImageVal $ImageVal\n";
         my $link = $Images->following-sibling::link[\@href];
         print "link $link\n";
         
     }

}

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georss.xml
<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom" xmlns:georss="http://www.georss.org/georss" xmlns:gml="http://www.opengis.net/gml" >
  <entry>
    <title>fileName1.jpg</title>
     <link href="PathTo/fileName1.jpg" />
  </entry>
  <entry>
    <title>fileName2.jpg</title>
     <link href="PathTo/fileName2.jpg" />
  </entry>
  <entry>
    <title>fileName3.jpg</title>
     <link href="PathTo/fileName3.jpg" />
  </entry>
  <entry>
    <title type="text">fileName.pdf</title>
     <link type="application/pdf"  href="PathTo/fileName.pdf" />
  </entry>
    <georss:where>
     <point xmlns="http://www.opengis.net/gml" srsName="urn:ogc:crs:EPSG:4326">
      <pos>45.256 -71.92</pos>
     </point>
  </georss:where>

</feed>

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0
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Question by:trevor1940
2 Comments
 
LVL 35

Accepted Solution

by:
Robert Schutt earned 500 total points
Comment Utility
Try it like this:
foreach my $Entry ($xpc->findnodes("//dft:feed/dft:entry")) {

     foreach my $Images ($xpc->findnodes("./dft:title[not(\@type='text')]", $Entry)) {
         my $ImageVal = $Images->textContent;

          ####  This finds all the Images
         print "ImageVal $ImageVal\n";
         my $link = $xpc->findvalue('following-sibling::dft:link[1]/@href', $Images);
         print "link $link\n";
         
     }

}

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0
 
LVL 1

Author Closing Comment

by:trevor1940
Comment Utility
That worked thank you
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