I am somehow stuck and banging my head. I have to delete unwanted TRADES from a huge XML file. 

  <TRADEEXT>
    <TRADE origin = 1,version =1>
      <EVENT externtype ='PROC'>
      </EVENT>
    </TRADE>
    <TRADE origin = 1,version =1>
      <EVENT externtype ='PROCC'>
      </EVENT>
    </TRADE>
    
    </TRADEEXT>

[download]

Now, the second TRADE is having externtype = 'PROCC' inside <EVENT> node which is not legitimate(legitimate value is 'PROC')

Hence the final output should be 

    <TRADEEXT>
    <TRADE origin = 1,version =1>
      <EVENT externtype ='PROC'>
      </EVENT>
    </TRADE>
    <TRADEEXT>

[download]

which should get pasted to new file. My code is 

 use strict;
    use warnings;
    use XML::Twig;
    
    my $twig = new XML::Twig( twig_handlers => { TRADE => \&TRADE } );
    $twig->parsefile('1513.xml');
    $twig->set_pretty_print('indented');
    $twig->print_to_file('out.xml');
    
    sub TRADE {
        my ( $twig, $TRADE ) = @_;
        foreach  my $c ($TRADE->children('EVENT')) 
        {
         $c->cut($TRADE) unless
         $c->att('eventtype') eq "PROC"
               
          ;
        }
    }

[download]

Unfortunately, it's deleting EVENT tag instead of TRADE tag. Any hint will be appreciated.

In reply to filtering unwanted tags based on child tag attribute value by vikas1316

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