IPIG-System-Number {1.0.10161.6.1} DEFINITIONS ::=

BEGIN

IMPORTS System-Id, ILL-String FROM ISO-10161-ILL-1;

IPIG-system-number::=SEQUENCE OF SEQUENCE
{
 	type		CHOICE
	{
		well-known	[1]Well-Known-System,
		other		[2]System-Id
	},
	database-ID		[3]ILL-String OPTIONAL,
	number			[4]ILL-String
}

Well-Known-System::=ENUMERATED
	{
		library-of-Congress	(1),
		bNB			(2),
		canadiana		(3),
		oCLC			(4),
		dialog		(5),
		rLIN			(6),
		wLN			(7),
		cARL			(8)
	}
END