| Interface Summary | 
| ParserPool | Provides instances of parsers as needed. | 
| Renderable | This interface caraterize objects other than ASTNodes that can be rendered
  to a writer using a context. | 
| RuntimeConstants | This class defines the keys that are used in the velocity.properties file so that they can be referenced as a constant within
 Java code. | 
| RuntimeLogger | Deprecated. This functionality has been taken over by the Log class | 
| RuntimeServices | Interface for internal runtime services that are needed by the
 various components w/in Velocity. |