Data delimiter

Each issuing agency uses its own delimiters, such as GS1 application identifiers. They must be correct for scanners to read the device identifier and production data reliably.

For the purposes of this guidance, “data delimiter” means a defined data character or set of data characters that identifies specific data elements within an encoded data string represented in the UDI carrier.

FDA guidance: Unique Device Identification System: Form and Content of the Unique Device Identifier (UDI) (July 2021), Section IV.C, Data delimiters