服务质量(Qualities of Service, QoS)：它包括了实现信息的可用性、性能、数据吞吐量以及数据的一致性或者正确性。

Qualities of Service (QoS) : This can include goals for the information availability, performance, data throughput, and consistency or accuracy of the data.

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QoS 层可让 SOA 对每个 SOA 层中的服务质量不一致性发出信号。

The QoS layer lets an SOA signal noncompliance with service qualities in each SOA layer.

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