GDTI

The GDTI or Global Document Type Identifier is the GS1 Identification Key for a document type combined with an optional, alpha-numeric serial number. GDTIs are used to access database information that is required for document control purposes. The GDTI is assigned for the life time of the document type and may be bar coded using Application Identifier (253).

The GDTI is constructed as:

GS1 Company Prefix         Document TypeCheck
Digit
Serial Component
(Optional)
N1N2N3N4N5N6N7N8N9N10N11N12
N13
X1 variable X17

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