The GS1-128 barcode is a subset of the Code 128 barcode symbology. Its use is exclusively licenced to GS1 and supports GS1 system data structures, including Function 1 Symbol Character (FNC1). This extremely flexible symbology encodes element strings using GS1 Application Identifiers, in this case AI(00) for a SSCC.
Figure 3.8‑1. GS1-128 barcode