I know you've said you use XML::Twig, but ... this solution has the additional advantage that it doesn't keep the whole parsed document in memory:

use strict;
use warnings;
no warnings 'uninitialized';
use XML::Rules;

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

my $parser = XML::Rules->new(
    stripspaces => 7,
    rules => {
        'q,xr' => sub {
            return if $_[1]->{supp} eq 'yes' or $_[1]->{info} eq 'yes'
+;
            return '+count' => 1;
        },
        qp => sub {
            printf "Definition '%s' has %d quotations.\n", $_[1]->{nam
+e}, $_[1]->{count}+0;
            return '+total' => $_[1]->{count}+0;
        },
        foo => sub { return $_[1]->{total} },
        _default => '',
    },
);

my $total = $parser->parse($xmlStr);
print "The total count is $total\n";
[download]

---

---

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! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

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:
	&		&
	<		&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.