IEC61850 DEFINITIONS ::= BEGIN

GOOSEpdu ::= CHOICE {
	gseMngtPdu	[APPLICATION 0] IMPLICIT GSEMngtPdu,
	goosePdu	[APPLICATION 1] IMPLICIT IECGoosePdu,
	...
}

GSEMngtPdu ::= SEQUENCE {
	stateID		[0] IMPLICIT INTEGER,
--	security	[3] ANY OPTIONAL,
					-- reserved for future definition
	requestResp	RequestResponse
--	CHOICE {
--		requests	[1] IMPLICIT GSEMngtRequests,
--		responses	[2] IMPLICIT GSEMngtResponses
--	}
}

RequestResponse ::= CHOICE {
	requests	[1] IMPLICIT GSEMngtRequests,
	responses	[2] IMPLICIT GSEMngtResponses
}

GSEMngtRequests ::= CHOICE {
	getGoReference			[1] IMPLICIT GetReferenceRequestPdu,
	getGOOSEElementNumber	[2] IMPLICIT GetElementRequestPdu,
	getGsReference			[3] IMPLICIT GetReferenceRequestPdu,
	getGSSEDataOffset		[4] IMPLICIT GetElementRequestPdu,
	...
}

GSEMngtResponses ::= CHOICE {
	gseMngtNotSupported		[0] IMPLICIT NULL,
	getGoReference			[1] IMPLICIT GSEMngtResponsePdu,
	getGOOSEElementNumber	[2] IMPLICIT GSEMngtResponsePdu,
	getGsReference			[3] IMPLICIT GSEMngtResponsePdu,
	getGSSEDataOffset		[4] IMPLICIT GSEMngtResponsePdu,
	...
}

GetReferenceRequestPdu ::= SEQUENCE {
	ident	[0] IMPLICIT VisibleString, -- size shall support up to 65 octets
	offset	[1] IMPLICIT SEQUENCE OF INTEGER,
	...
}

GetElementRequestPdu ::= SEQUENCE {
	ident		[0] IMPLICIT VisibleString, -- size shall support up to 65 octets
	references	[1] IMPLICIT SEQUENCE OF VisibleString,
	...
}

GSEMngtResponsePdu ::= SEQUENCE {
	ident		[0] IMPLICIT VisibleString, -- echos the value of the request
	confRev		[1] IMPLICIT INTEGER OPTIONAL,
	posNeg		PositiveNegative,
--	CHOICE {
--		responsePositive	[2] IMPLICIT SEQUENCE {
--			datSet				[0] IMPLICIT VisibleString OPTIONAL,
--			result				[1] IMPLICIT SEQUENCE OF RequestResults
--		},
--		responseNegative	[3] IMPLICIT GlbErrors
--	},
	...
}

PositiveNegative ::= CHOICE {
	responsePositive	[2] IMPLICIT SEQUENCE {
		datSet				[0] IMPLICIT VisibleString OPTIONAL,
		result				[1] IMPLICIT SEQUENCE OF RequestResults
	},
	responseNegative	[3] IMPLICIT GlbErrors
}

RequestResults::= CHOICE {
	offset		[0] IMPLICIT INTEGER,
	reference	[1] IMPLICIT IA5String,
	error		[2] IMPLICIT ErrorReason
}

GlbErrors ::= INTEGER {
	other(0),
	unknownControlBlock(1),
	responseTooLarge(2),
	controlBlockConfigurationError(3) --,
--	...
}

ErrorReason ::= INTEGER {
	other (0),
	notFound (1) --,
--	...
}

IECGoosePdu ::= SEQUENCE {
	gocbRef				[0] IMPLICIT VisibleString,
	timeAllowedtoLive	[1] IMPLICIT INTEGER,
	datSet				[2] IMPLICIT VisibleString,
	goID				[3] IMPLICIT VisibleString OPTIONAL,
	t					[4] IMPLICIT UtcTime,
	stNum				[5] IMPLICIT INTEGER,
	sqNum				[6] IMPLICIT INTEGER,
	simulation			[7] IMPLICIT BOOLEAN DEFAULT FALSE,
	confRev				[8] IMPLICIT INTEGER,
	ndsCom				[9] IMPLICIT BOOLEAN DEFAULT FALSE,
	numDatSetEntries	[10] IMPLICIT INTEGER,
	allData				[11] IMPLICIT SEQUENCE OF Data --,
--	security			[12] ANY OPTIONAL
							 -- reserved for digital signature
}

UtcTime ::= OCTET STRING -- format and size defined in 8.1.3.6.

TimeOfDay ::= OCTET STRING -- (SIZE (4 | 6))
FloatingPoint ::= OCTET STRING


Data ::= CHOICE
	{
	-- context tag 0 is reserved for AccessResult
	array			    [1] IMPLICIT SEQUENCE OF Data,
	structure		    [2] IMPLICIT SEQUENCE OF Data,
	boolean			    [3] IMPLICIT BOOLEAN,	
	bit-string		    [4] IMPLICIT BIT STRING,
	integer			    [5] IMPLICIT INTEGER,
	unsigned		    [6] IMPLICIT INTEGER,
	floating-point		[7] IMPLICIT FloatingPoint,
	real		 	    [8] IMPLICIT REAL,
	octet-string		[9] IMPLICIT OCTET STRING,
	visible-string		[10] IMPLICIT VisibleString,
	binary-time		    [12] IMPLICIT TimeOfDay,
	bcd			        [13] IMPLICIT INTEGER,
	booleanArray		[14] IMPLICIT BIT STRING,
    objId               [15] IMPLICIT OBJECT IDENTIFIER,
  ...,
    mMSString           [16] IMPLICIT MMSString,
    utc-time            [17] IMPLICIT UtcTime				-- added by IEC61850 8.1 G3	
    }

MMSString ::= UTF8String

END