ISO 12620:2009提供了与实施适用于所有类型语言资源（例如术语、词典、基于语料库、机器翻译等）的数据类别注册（DCR）相关的约束准则。它规定了创建、选择和维护数据类别的机制，以及表示这些类别的交换格式。

ISO 12620:2009 provides guidelines concerning constraints related to the implementation of a Data Category Registry (DCR) applicable to all types of language resources, for example, terminological, lexicographical, corpus-based, machine translation, etc. It specifies mechanisms for creating, selecting and maintaining data categories, as well as an interchange format for representing them.