#!/usr/bin/perl --
use Path::Tiny qw/ path /;
use Data::Dump qw/ dd /;
use XML::Twig;

my $infile  = 'twiggy-test.xml';
my $outfile = 'twiggy-WHAT.xml';
dd( path( $infile )->slurp_utf8 );
getTwiggy( $infile , $outfile );
dd( path( $outfile )->slurp_raw );
sub getTwiggy { 
 
 # set up the XML parser:
 my $twig= XML::Twig->new( 
   comments => 'keep',
 #  keep_encoding => 1,
   keep_spaces=> 1,
   twig_handlers => { li => sub_ix_strings($infile),
   		      
  		     },
 );
 
 $twig->parsefile($infile);

   print "  Saving $outfile...\n";
   open(NEW,">$outfile") || die("cannot open file $outfile for writing.\n");
   $twig->flush( \*NEW);
   close(NEW);

}

sub sub_ix_strings {
  my($file) = @_;
  return sub {	
   my($twig,$elt) = @_;
   $elt->set_att('test',"hello");
  }
}
__END__


##</code><code>##

<?xml version="1.0" encoding="UTF-8"?>
<reference id="ids_excal_142" xml:lang="en-us">
<title>The ISO character set</title>
<refbody>
<section><p>Each ISO character has its own value, except that lowercase
characters are translated to uppercase. Two characters that have no
uppercase equivalent are: <ul>
<li test="hello">German small sharp s (ß - 0xDF)</li>
<li test="hello">Lowercase y diaeresis/umlaut (ÿ - 0xFF)</li>
</ul></p></section>
</refbody>
</reference>