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GSCN 23-103 (GS1 General Specifications Change Notification) is the GS1 specification that defines identification standards for the European Digital Product Passport under ESPR Regulation (EU) 2024/1781. This specification establishes rules for the use of GTIN (GTIN-8, GTIN-12, GTIN-13, GTIN-14 formats), GLN (13-digit Global Location Number), GS1 Digital Link URI with uncompressed syntax, Application Identifiers (AI 01, 03, 10, 21, 22, 242), and identification granularity (model, batch, serial). It ensures global interoperability and regulatory compliance. Verisav validates all DPPs according to this specification to ensure compliance with GS1 standards.