CheckDigit_GTIN_13 ( SeedNumber )

Generates the check digit for GTIN-13 number

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Olivier Caulet - Show more from this author
Helixir
http://www.caulet.ch/helixir

Sample input:

CheckDigit_GTIN_13 ( 760100000000 )

Sample output:

Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

// Author : O. Caulet
// Last Update : July 13, 2016
// Generates the check digit for a GTIN-13
// after W Brent Simon CheckDigit_GTIN_14
// and GS1 General Specifications
// 
// à utiliser par exemple pour
// le n° d'identification des professionnels enregistrés
// dans le registre des professions médicales suisse

Definir ( [ GTIN13 = 

3 * (
	+ Extrait ( SeedNumber ; 2 ; 1 )
	+ Extrait ( SeedNumber ; 4 ; 1 )
	+ Extrait ( SeedNumber ; 6 ; 1 )
	+ Extrait ( SeedNumber ; 8 ; 1 )
	+ Extrait ( SeedNumber ; 10 ; 1 )
	+ Extrait ( SeedNumber ; 12 ; 1 )
	)

+

1 * (
	+ Extrait ( SeedNumber ; 1 ; 1 )
	+ Extrait ( SeedNumber ; 3 ; 1 )
	+ Extrait ( SeedNumber ; 5 ; 1 )
	+ Extrait ( SeedNumber ; 7 ; 1 )
	+ Extrait ( SeedNumber ; 9 ; 1 )
	+ Extrait ( SeedNumber ; 11 ; 1 )
)  ] ; 

Si ( GTIN13 / 10 = Ent ( GTIN13 / 10 ) ; 0 ; (( Ent ( GTIN13 / 10) + 1) * 10 ) - GTIN13 ) )

The GS1's Global Location Number (=GTIN-13) can be used by companies to identify their locations, giving them complete flexibility to identify any type or level of location required. The GS1 General Specifications is the core standards document of the GS1 System describing how GS1 bar codes and identification keys should be used. GLN IS FULLY COMPATIBLE WITH ISO STANDARD 6523. THE INTERNATIONAL CODE DESIGNATOR (ICD) FOR THE GLN IS ‘0088’.
This function calculates the check digit for EAN/GLN/GTIN-13 numbers.

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CheckDigit_GTIN_13 ( SeedNumber )

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