Diagnostic-Reason ::=
    CHOICE {
	serviceError[1]
	    ServiceProblem,

	securityError[2]
	    SecurityProblem
    }

ServiceProblem ::=
    INTEGER {
	busy(1),
	unavailable(2),
	unwillingToPerform(3),
	chainingRequired(4),
	unableToProceed(5),
	invalidReference(6),
	timeLimitExceeded(7),
	administrativeLimitExceeded(8),
	loopDetected(9),
	unavailableCriticalExtension(10),
	outOfScope(11),
	badVersion(12)
    }

...