It initially defined as 3d informationavailability, this problem is much broader and related to many other aspects of engineering information.
起初这个问题被定义为3d信息的获取，但它的含义远不止这些，还牵涉到工程信息的许多其他方面。
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Qualities of Service (QoS) : This can include goals for the informationavailability, performance, data throughput, and consistency or accuracy of the data.
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。
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More information about high availability and security issues is available in the resources section.