Basic UDI-DIs (or Global Model Number – GMN in GS1 standards) are created from the GS1 Company Prefix(es) your GS1 Member Organisation has assigned to your company. The GMN comprises a GS1 Company Prefix and a Model Reference – this Model Reference is assigned by the company and can be for instance internal numbers (alphanumeric) already in use in your company.
The two combined (GS1 Company Prefix + Model Reference) can be up to 23 characters long. Please find more information on our brochure "Be ready for UDI in Europe": https://www.gs1.org/sites/default/files/gs1_udi_in_the_eu_v2_august-2019.pdf
The GMN has two mandatory check characters, that you can generate using this tool:https://www.gs1.org/services/gmn-generator
See also instructions on the calculation here:https://www.gs1.org/sites/default/files/checkcharacterpaircalculation_0.pdf
GS1 has developed helper libraries that can be integrated in your systems to calculate automatically:https://www.gs1.org/services/check-character-calculator/gmn-helper-libraries
Was this article helpful?
That’s Great!
Thank you for your feedback
Sorry! We couldn't be helpful
Thank you for your feedback
Feedback sent
We appreciate your effort and will try to fix the article