| Is the reference designator on a Drawing or BluePrint where the BOM is used.
 Is an identifier used to refer to an instance of the  Item (part number) in manufacturing instructions, engineering drawings and/or CAD models. ReferenceDesignator is also often known as an installation point. There will be a single distinct ReferenceDesignatorID for each instance of an Item, however multiple distinct ItemIDs could have the same ReferenceDesignatorID value within a BOM, such as for alternate parts or parts selected from a test-fit-and-select processes. (Defined in file
										Fields.xsd
										, or a file it imports)
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