public function getLogicalOperator()
    {
        $returnValue = null;

        
         if(empty($this->logicalOperator)){
         	$property = new core_kernel_classes_Property(RulesRdf::PROPERTY_HASLOGICALOPERATOR);
			$this->logicalOperator = $this->getUniquePropertyValue($property);
         }
         $returnValue = $this->logicalOperator;
        

        return $returnValue;
    }