Performance Manager并不直接使用这些名称空间，但是Performance Manager的跟踪信息、服务登记和其他事务数据需要登记名称空间数据。
Performance Manager does not use these namespaces directly, but the tracking information of Performance Manager, service enrollments and other transaction data requires enrollment namespace data.
空间数据模型是地理信息系统设计的核心和基础。
Spatial data model is the core and base of three dimensional geographic information system design.
GIS支持地理空间数据的采集、存储和显示，并能将地理空间数据与相关参考数据关联以提供信息查询与分析。
GIS supports the collection, storage and display of geographic space data, and provides information inquiry and analysis by relating the geographic space data with reference data.
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