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4513 -	Maintenance operation, coded UN/CEFACT Revision 1997B Code List
Repr:	an..3
Desc:	To indicate the type of data maintenance operation for an object, such as add, delete, replace.
	This table also occurs in the following versions of this standard: D00A, D00B, D01A, D01B, D01C, D02A, D02B, D03A, D03B, D04A, D04B, D95A, D95B, D96A, D96B, D97A, D97B, D98A, D98B, D99A, D99B

1	New
	The data is to be processed as new.
2	Add and replace
	The data contains new objects, which are to be added, and existing objects, which are to replace objects which have the same identifier.
3	Replace
	The data is to replace existing data which has the same identifier.
4	Delete
	The data identified is to be deleted.
5	None
	The data is not to be maintained.
6	Addition
	Maintenance operation involves addition.
7	Change
	Maintenance operation involves change.
8	Marked for deletion
	The item is marked for deletion in a future release.

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.

Usage indicators
	Used in batch messages only.
	Common usage in both batch and interactive messages.
	Used in interactive messages only.

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