in reply to XML::Twig - Using xpath with twig roots

As documented, Twig does not support full XPath for handlers. Either create a flag that prevents processing of the 2nd and following occurences, or use a different module to handle XML that supports XPath (as XML::LibXML::Reader).
Update :An example using my favourite XML handling module, XML::XSH2:
open 944240.xml ;
echo /bitrate[@name="1000"]/track[@type="V"]/range[1]/rangeStartTime ;

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Re^2: XML::Twig - Using xpath with twig roots
by Anonymous Monk on Dec 19, 2011 at 14:38 UTC
    Thanks. Does findnodes() also not support the full Xpath? I see references that it does, but somehow it doesnt work for me.
[reply]

      According to this post, findnodes() uses the full XPath engine. Also, I noticed that the use of position selectors like range[1] isn't supported on twig_handlers or twig_roots.

      Since you're dealing with a very, very small XML, I tried this and returned both rangeStartTimes. I cheated:)... 
      #!/usr/bin/perl -l

use strict;
use warnings;
use XML::Twig::XPath;

$|=1;

my $file = '/root/Desktop/bitrate.xml';
my $twig =  XML::Twig::XPath->new( twig_roots => {
    "//range/rangeStartTime" => \&update });
$twig->parsefile($file);

sub update {
    my ($twig, $server) = @_;
    print $server->text;
}

      [download]
      Here's the tidied XML: 
      <?xml version="1.0" encoding="UTF-8"?>
<bitrate name="1000">
  <track type="V">
    <range>
      <rangeStartTime>1261287</rangeStartTime>
      <rangeEndTime>1324271</rangeEndTime>
    </range>
    <range>
      <rangeStartTime>1324282</rangeStartTime>
      <rangeEndTime>0.000</rangeEndTime>
    </range>
  </track>
</bitrate>

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      Update: fixed typo
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