Clinical Trials Download the current standard Implementation Guidelines GS1 XML Transport Instruction and Response Implementation Guide GS1 XML Technical User Guide EDIINT AS1 and AS2 Transport Communication Guidelines Previous versions of this standard Version 3.5 (zip) About this standard This version: 3.5.1 Publication date: Apr 2022 Next version planned for May 2023 Previous versions Any questions? We can help you get started using GS1 standards. Contact your local office Get involved Standards Maintenance Groups (SMGs) improve existing standards List of working groups