public function removePropertyValue( core_kernel_classes_Property $property, $value)
    {
        $returnValue = (bool) false;
        $returnValue = $this->getImplementation()->removePropertyValues($this, $property, array(
        	'pattern'	=> (is_object($value) && $value instanceof self ? $value->getUri() : $value),
        	'like'		=> false 
        ));
        $this->onUpdate();
        return (bool) $returnValue;
    }