ProductInstanceUri is a globally unique resource identifier assigned by the Manufacturer to a Device. This is often stamped on the outside of a physical component and may be used for traceability and warranty purposes. The identifier shall be a valid URI that meets the following requirements:
Have a length which does not exceed the limits imposed by the labelling technology chosen by the manufacturer;
Truly globally unique with a structure that enforces it.
Other standards, such as DIN 91406, define specific syntaxes that could meet these requirements.
Examples of ProductInstanceUris: