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<root>
  <parent>p1 p2 <ch1>c1_1</ch1> p3 <ch2>c2</ch2> p4 <ch1>c1_2</ch1> p5
+</parent>
</root>

'root' => {
          'parent' => [
...
                      }
                      ]
          }

my $parser =  XML::Rules->new (
  rules => [
...
    ]
);
my $result = $parser->parsestring($xml);

# different Rule for "parent"
  parent => sub {$_[0]->{text} => $_[1]->{_content}},