Data Quality

DataQualityTo be able to check the quality of a global product data repository, some basic rules must be understood in order to create quality tools.

GTIN code control

Control of the format

The last digit of a GTIN code is computed using previous digits in order to avoid manual errors when the code is typed manually.
The algorithm is explained on the GS1 website at the following address : http://www.gs1.org/barcodes/support/check_digit_calculator

Control of the first 3 digits

The 3 first digit of the GTIN-13 code indicates the nature of the product or in the country in  which it has been registered. The following list gives the correspondence:  http://www.gs1.org/barcodes/support/prefix_list
If a GTIN-13 code starts with 3 digits not allowed by GS1, then this code can’t be integrated into the repository.

GCP length Control

http://www.gs1.org/docs/gcp_length/GCPPrefixFormatList.xml

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