It is a simple tool used to identify a location and can identify locations uniquely where required.
The mechanism for GLN is the same as GTIN-13.
/**
* testInvalidGln
*
* @param mixed $gln
*
* @dataProvider getInvalidGln
*
* @return void
*/
public function testInvalidGln($gln)
{
$this->assertFalse(Gln::validate($gln));
}
