The existing mappings also can be combined to build a compositemapping.
还可以将现有映射进行组合，构建复合映射。
2
A user-defined relationship is mapping of one component of a composite application to another component.
一个用户定义的关系就是从组合程序中一个构件到另一个构件的映射。
3
Through the mapping of community roles to domain roles, it is guaranteed that a user of a composite application is assigned to the mapped domain roles of an included business component.