Thanks toolic! I went with your modification and extended it a bit to include a couple more conditions.

 
use warnings;
use strict;
use XML::Twig;
my $source_file = 'datafile_towns.xml';
my $out_file = 'illytowns.xml';
my $twig = XML::Twig->new(
    twig_handlers => { town => \&town },
);

$twig->parsefile($source_file);
open (my $fh_out, '>', $out_file) or die "unable to open '$out_file' f
+or writing: $!";

sub town {
    my ($twig, $town) = @_;
    my $townx = $town->first_child('location')->first_child('mapx')->t
+ext;
    my $towny = $town->first_child('location')->first_child('mapy')->t
+ext;
    if (($townx > 556) and ($towny > -2502) and ($towny < -2214)) {
        print $town->first_child('towndata')->first_child_text('townna
+me');
        print "\n";
    }
    
    $twig->print($fh_out);
    $twig->purge;
}

[download]
I've added a file handle to print the data to a file rather than to STOUT; however, it is not working correctly, as instead of getting a file with a list of town names I get a a full set of tags for 1 XML element (probably the last element in the XML file). The STDOUT generated by the print statement inside the twig is correct.

In reply to Re^2: TWIGging XML to CSV: what's wrong with my syntax? by tinker
in thread TWIGging XML to CSV: what's wrong with my syntax? by tinker

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.