At a business level, the service consumer and service provider use the service specification to understand what functional behavior is achieved by engaging in a service interaction.
在业务级别，服务使用者和服务提供者使用服务规范来了解进行服务交互能够实现什么功能行为。
Error behavior, controlling what information is delivered to service consumer in case of internal errors.
错误处理，控制在内部出错时提供给服务消费者的信息。
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