Marking Methodology
UID bar code must be maintained as a readable bar code throughout the entire life of the item; hence strong consideration must be given to the UID-marking methodology. Metal tag with a permanent adhesive or durable polyester label are suitable for many environments but other marking items such as laser etch, dot peen, Metalphoto photosensitive anodized aluminum, chemical etch or ink jet can also be used for direct part Unique Identification.
The following methodologies (constructs) and equivalents are approved:
- UID Construct 1, composed of Issuing Agency Code, an Enterprise Identifier, and a Serial Number unique within the Enterprise
- UID Construct 2, composed of Issuing Agency Code, an Enterprise Identifier, a Part Number and a Serial Number (unique within the Part Number)
The following IUID Equivalents are also approved:
- Vehicle Identification Number (VIN)
- Global Returnable Asset Identifier (GRAI)
- Global Individual Asset Identifier (GIAI)
- Electronic Serial Number (ESN), typically assigned to cell phones
Accepted Issuing Agencies:
- DoD and NATO (CAGE or NCAGE)
- D-U-N-S (Dun & Bradstreet)
- GS1 (formerly EAN/UCC)
Read more about this topic: UID Compliance
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