Try this: 
use strict;
use warnings;
use XML::Twig;

my $xmlStr = <<XML;
<foo>
    <qp>
        <q supp="yes">hello</q>
        <q supp="no">bye</q>
        <xr supp="yes">later</xr>
    </qp>
</foo>
XML

my $twig= XML::Twig->new();
$twig->parse($xmlStr);
my $elt = $twig->root();
my @qps = $elt->children('qp');
my $numOfQuotes = 0;
for my $qp (@qps) {
    for my $q ($qp->children( qr/^(q|xr)$/ )) {
        $numOfQuotes++ if $q->att('supp') eq 'yes';
    }
}
print "numOfQuotes = $numOfQuotes\n";

__END__

numOfQuotes = 2

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In reply to Re: XML::twig counting elements that don't have a certain attribute/value on them by toolic
in thread XML::twig counting elements that don't have a certain attribute/value on them by mertserger

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