by creating and storing a named list of policy revisions that work together, you can create a cohesive set of specific revisions of all the policies in a soa.
通过创建及存储指定的共同工作的策略修正列表,您可以在soa 中创建所有策略的一套相应的特定的修正。
a domain package is a set of classes that collaborate among themselves to support a cohesive set of contracts that can be considered black boxes.