该文档描述SCA装配模型，其覆盖如下内容： z 服务的装配模型，既适合紧耦合也适合松散耦合。 z 应用基础设施功能于服务与服务交互模型，包括安全性和事务性-This document describes the SCA assembly model, which covers the following: z service assembly model, both for tight coupling is also suitable for loosely coupled. z