ISO 21962:2003规定了建立数据实体字典（DED）中使用的参数值语言（PVL）的要求。 ISO 21962:2003旨在供数据实体词典的实施者使用，例如，供数据生产者使用，以更正式的方式构建描述其数据产品中数据实体的词典；由数据用户理解从使用ISO 21962:2003构建词典的数据生产者处收到的数据； 由一个组织授权用于定义该组织内使用的字典中的每个实体描述的属性；由特定社区，如地球观测、空间物理、档案等，对与数据产品相关的任何数据字典的内容建立一定程度的标准化（这将通过使用ISO 21962:2003定义社区范围的数据字典来实现）；由组织和社区以标准化的方式交换数据字典的内容，即。 e、 以促进互操作性。

ISO 21962:2003 specifies the requirements for establishing a parameter value language (PVL) to be used in the creation of a data entity dictionary (DED). ISO 21962:2003 is intended to be used by implementers of data entity dictionaries, and for example, by data producers to construct dictionaries that describe, in a more formal manner, data entities within their data products; by data users to understand data received from data producers who have used ISO 21962:2003 to construct their dictionaries; by an organization that mandates the attributes used to define each entity description in dictionaries used within that organization; by a particular community, such as Earth observation, space physics, archives, etc., to establish a degree of standardization for the contents of any data dictionary associated with a data product (this would be done by using ISO 21962:2003 to define a community-wide data dictionary); by organizations and communities to exchange the contents of a data dictionary in a standardized manner, i.e. to facilitate interoperability.