WG 2 - Unique identifiers and data carriers

This document defines requirements for data carriers used in a digital product passport system. This covers: symbology characteristics, format, error correction codes, encoding methods, printing and production quality, and durability.
This document also defines requirements on graphical or other indicators for easy recognition of DPP data carriers and the indication on the data carrier placement, machine readability, quality checking, links between physical product and digital representation.
The following aspects are out of scope: Architecture and use cases, Secure elements and any other cryptographic security features.

This document defines the principles and specifies the requirements and guidelines for unique product identifiers, unique economic operator identifiers, and unique facility identifiers used in digital product passports. It covers the following areas:
a)   global uniqueness;
b)   persistence;
c)   syntax;
d)   semantics;
e)   interoperability;
f)   openness.
This document accommodates unique product identifiers at three granularity levels of specificity: model, batch, or individual item, to support various operational needs.
This document describes identification (ID) schemes that use issuing agencies, self-issuing systems, or a combination of both.