Understand how to create an entity supertype, subtypes, and associated services to allow the processing of each.

了解如何创建实体超类型、子类型和相关服务。

youdao

Understand how to create an entity supertype, subtypes, and associated services to allow the processing of each.

了解如何创建实体超类型、子类型和相关服务。

youdao