GS1 EPC Tag Data Standard 1.6 - Indicod-Ecr

144814491450145114527.6 Global Service Relation Number (GSRN)The GSRN EPC (Section 6.3.6) corresponds directly to the GSRN key defined inSections 2.5 and 3.9.9 of the GS1 General Specifications [GS1GS10.0].The correspondence between the GSRN EPC URI and a GS1 element string consisting ofa GSRN key (AI 8018) is depicted graphically below:EPCURIurn:epc:id:gsrn:CompanyPrefixServiceReference1453145414551456145714581459146014611462146314641465146614671468146914701471147214731474GS1ElementStringFigure 13.Correspondence between GSRN EPC URI and GS1 Element StringFormally, the correspondence is defined as follows. Let the EPC URI and the GS1element string be written as follows:EPC URI: urn:epc:id:gsrn:d 1 d 2 …d L .d (L+1) d (L+2) …d 17GS1 Element String: (8018)d 1 d 2 …d 18To find the GS1 element string corresponding to a GSRN EPC URI:1. Number the digits of the two components of the EPC as shown above. Note thatthere will always be a total of 17 digits.2. Calculate the check digit d 18 = (10 – ((3(d 1 + d 3 + d 5 + d 7 + d 9 + d 11 + d 13 + d 15 + d 17 )+ (d 2 + d 4 + d 6 + d 8 + d 10 + d 12 + d 14 + d 16 )) mod 10)) mod 10.3. Arrange the resulting digits and characters as shown for the GS1 Element String.To find the EPC URI corresponding to a GS1 element string that includes a GSRN(AI 8018):1. Number the digits and characters of the GS1 element string as shown above.2. Determine the number of digits L in the GS1 Company Prefix. This may be done, forexample, by reference to an external table of company prefixes.3. Arrange the digits as shown for the EPC URI. Note that the GSRN check digit d 18 isnot included in the EPC URI.Example:(8018)CompanyPrefixServiceReferenceEPC URI: urn:epc:id:gsrn:0614141.1234567890GS1 element string: (8018) 0614141 1234567890 2CheckDigitCopyright ©2005- 2011 GS1 AISBL, All Rights Reserved. Page 49 of 218