Nucleus properties files use several special properties that are indicated by a leading $ character:
  | The component’s Java class.  | 
  | The scope of the component (global, session, or request). The default value is global. See the Component Scopes section in this chapter.  | 
A brief description of the component, for display in the ATG Control Center Components task areas.  | |
  | The Nucleus path of another component that will supply configuration property values for the current component. See Basing a Component on another Component.  | 
  | Specifies the Nucleus path of a component that is based on a class that implements the  For example, you can use the   | 
$description
Given a large number of components in a typical Nucleus application, it can be helpful to document what each component does. You can document your components using the $description property. For instance, you might describe a Person component like this:
$description=Holds name and age traits of users

