功能需求文档：详细描述SOA将作为业务服务提供的所有业务流程。
Functional requirements document: Describes in detail all the business processes that the SOA will surface as business services.
例如，让我们假设您是软件架构师，总是按照软件需求规范（Software Requirement Specification，SRS）来将项目功能需求描述成一列不相干的“应该有”的条目。
For example, let's say you are a software architect who has always described project functional requirements as a list of unrelated "shall have" items in a Software Requirement Specification (SRS).
需求描述了所有产品功能，并且定义了实现这些功能的约束条件。
The requirements describe all the product functions, as well as the constraints under which these functions should be realized.
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