The example illustrates the use of UsageNodes. A UsageNode represents a position in an abstract vehicle. For example the Head Light Left. UsageNodes belong to the master data and they are defined on some company wide level. They can be used to enforce consistent naming over different projects and different development streams (e.g. between geometry and electrologic).
A UsageNode can be subdivided into more detailed UsageNodes. For example the Head Light can be split up into Main Beam, Low Beam and Direction Indicator.