Below is the dump when i do not use keyAttr and Force attributes in declaring the xml variable
$VAR1 = {
          'response1' => {
                       'value1' => {
								'tag1'=>'value2'
								'tag2'=>'value3'
								'tag3'=>'value4'
								},
                       'value2' => {
                                   'tag1' => 'value4',
                                   'tag2' => 'value5',
                                   'tag3' => 'value6',
                              }
						'value3'=> {
									'tag1'=> 'value9'
									'tag2'=> 'value10'
                     }
        };