This part of ISO/IEC 15459 specifies a unique string of characters for the identification of individual
products and product packages. The character string is intended to be represented in a linear bar code
symbol or two-dimensional symbol or other AIDC media attached to the entity to meet management
needs. To address management needs different classes of identities are recognized in the various
parts of ISO/IEC 15459, which allows different requirements to be met by the identities associated
with each class.
The rules for the identification of an individual occurrence of a product or product package, understood
to mean the layers zero and one defined in the International Standards ISO 17367 and ISO 17366,
respectively, are defined and supported by examples.