Tagging reference
Tagging is a form of semantic modeling that assigns information (one or more tags) to objects. The tag information can help integrators and users significantly when searching for objects, designing system structures or navigating hierarchies.
Tagging can identify a device and indicate where it is physically located. By identifying and locating devices, tags provide a context for the device that can be used in many different ways. When you use tags, you can reduce or eliminate the requirement to manually map objects directly to a desired application.