UNO -

Object header
UN/EDIFACT Syntax Version 4 Segment List

	Function:	To head, identify and specify an object.
	This segment also occurs in the following versions of this standard: 40000, 40100

Pos			M/C	Repeat	Repr.
010	0800	Package reference number	M	1	an..35
020	S020	REFERENCE IDENTIFICATION	M	99
	0813	Reference qualifier	M		an..3
	0802	Reference identification number	M		an..35
030	S021	OBJECT TYPE IDENTIFICATION	M	99
	0805	Object type qualifier	M		an..3
	0809	Object type attribute identification	C		an..256
	0808	Object type attribute	C		an..256
	0051	Controlling agency, coded	C		an..3
040	S022	STATUS OF THE OBJECT	M	1
	0810	Length of object in octets of bits	M		n..18
	0814	Number of segments before object	C		n..3
	0070	Sequence of transfers	C		n..2
	0073	First and last transfer	C		a1
050	S302	DIALOGUE REFERENCE	C	1
	0300	Initiator control reference	M		an..35
	0303	Initiator reference identification	C		an..35
	0051	Controlling agency, coded	C		an..3
	0304	Responder control reference	C		an..35
060	S301	STATUS OF TRANSFER - INTERACTIVE	C	1
	0320	Sender sequence number	C		n..6
	0323	Transfer position, coded	C		a1
	0325	Duplicate Indicator	C		a1
070	S300	DATE AND/OR TIME OF INITIATION	C	1
	0338	Event date	C		n..8
	0314	Event time	C		an..15
	0336	Time offset	C		n4
080	0035	Test indicator	C	1	n1

Notes:
Pos	Position
M/C	Mandatory or Conditional
Repr.	Representation (Data or Content Type)
1.	The value in 0800 shall be unique within the interchange (except for a duplicate transfer).
2.	One mandatory occurrence of S020 shall identify the Object Identification Number.
3.	One occurrence of S021 is mandatory and shall be used for file format identification.
4.	Data elements S302, S301, S300 and 0035 are for interactive EDI use only: - The value(s) in S302 shall be identical to the value(s) in S302 in the preceding UIB. - 0035, when used, test applies to the message or package only.

Change indicators
plus sign		An addition.
asterisk		Addition/substraction/change to a code entry for a particular data element.
hash or pound sign		Changes to names.
vertical bar		Changes to text for descriptions, notes and functions.
minus sign		A deletion.
letter X		Marked for deletion.