Existing Wording
FDA Mandated Unique Device Identifier. Use the human readable information (the content that the user sees, which is sometimes different to the exact syntax represented in the barcode)

Comments
If using ONLY the human-readable interpretation of the UDI, any executable functions found in the barcode syntax will be lost.
FDA has recommended maintaining a copy of the barcode syntax of the UDI, on the backend, as the transactable form; the form that should be shared with other sources and applications and can be parsed into its constituent parts.
The human-readable interpretation (HRI) of the UDI can and should be rendered to the user, but maintaining the original barcode syntax of the UDI preserves the functionality for downstream users of the UDI data.

Grahame's Comments
need further discussion of this; is there a syntax for the executable functions? I haven't seen one. Has FDA published one and it's trasnform to a human readable portion?