ISO/IEC 15459-4:2014规定了用于识别单个产品和产品包装的唯一字符串。该字符串旨在以线性条形码符号或二维符号或其他自动识别和数据捕获（AIDC）介质表示，这些介质连接到实体上，以满足管理需要。为了满足管理需求，ISO/IEC 15459的各个部分中识别了不同类别的身份，这使得与每个类别相关的身份能够满足不同的要求。 产品或产品包装单独出现的标识规则（理解为分别指ISO 17367和ISO 17366中定义的零层和一层）由示例定义和支持。

ISO/IEC 15459-4:2014 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 automatic identification and data capture (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 ISO 17367 and ISO 17366, respectively, are defined and supported by examples.