描述符也可以提供与注释相同的有关实体的元数据信息，如主键字段，以及对象之间的任何映射。
The descriptor can also provide the same metadata information about the entities as annotations, such as primary key field, and any mappings between objects.
从这方面讲，Registry and Repository拥有部分服务信息和元数据，并通过治理和控制所管理的实体，从而在soa治理中发挥重要作用。
In that respect, Registry and Repository owns part of the service information and metadata, and plays a key role in SOA governance by governing and controlling the entities it manages.
服务描述实体是Service Registry提供的信息模型中的一个元数据类别，其中包括物理文档、逻辑派生和一般对象。
Service description entities are a category of metadata in the information model maintained by Service Registry that includes physical documents, logical derivations and generic objects.
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