Application Identifier (AI) 8019 specifies a Service Relation Instance Number (SRIN). The SRIN is used when the identification of a service relationship using a Global Service Relation Number (GSRN) for the recipient needs to be further specified with a sequence indicator corresponding to each encounter within the service process. AI 8019 enables the service provider to store data relating to specific instances of the service provided to the recipient.
The structure and content of the SRIN are determined by the owner of the GS1 Company Prefix in order to uniquely identify each specific service instance.