use strict;
use XML::Rules;
use Data::Dumper;

my $parser = XML::Rules->new(
	stripspaces => 7,
	rules => {
		'known-action,name' => 'content',
		'target' => sub {
			return $_[1]->{partner} => $_[1]->{'known-action'};
		},
		'targets' => 'no content',
		'drug' => 'pass no content'
	}
);

my $data = $parser->parse(\*DATA);
#print Dumper($data);

print "Name: $data->{name}\nType: $data->{type}\n";
while (my ($partner, $action) = each %{$data->{targets}}) {
  print "  $partner: $action\n";
}

__DATA__
<drug type="small molecule">
  <name>Goserelin</name>
  <targets>
      <target partner="1">
      <known-action>yes</known-action>
      </target>
      <target partner="2">
      <known-action>yes</known-action>
      </target>
      <target partner="3">
      <known-action>yes</known-action>
      </target>
  </targets>
</drug>