sensors. Events propagate within the context of their supporting business applications, providing near instantaneous impact of component level events on application health. 2.2 Architectural details The following provides the details for each of the major architectural components, describing both the rationale for its design and an overview of its implementation, In addition, it is explained how the pieces work together to populate the application mapping database and create and maintain application maps. 2.2.1 The Data Center Reference model The Configuration Discovery and Tracking Data Center Reference model represents a definition of data center infrastructure components, their cross-tier relationships and configuration attributes. The Data Center Reference Model is based on the DMTF's CIM object model. See http://www.dmtf.org For platform-specific extensions such as JSR773, see