| Interface Summary | 
| Attribute | Constants for common portal request, session and context
 attributes. | 
| Device | Encapsulates information about the client device | 
| GearContext | An interface used to store gear context data. | 
| GearServletRequest | The gear request object encapsulates all information from a portal
 for a gear to render. | 
| GearServletResponse | The gear response object encapsulates all information destined to a portal | 
| PortalContext | An interface used to store portal context data. | 
| PortalServletRequest | The portal request object encapsulates all information from a portal client | 
| PortalServletResponse | The portal response object encapsulates all information destined to a portal client |