The discovery subsystem root element. The discovery subsystem root type. An aggregating discovery provider element. A static discovery provider definition element. A provider which aggregates multiple other providers into one. The name of this provider. The list of providers which make up this provider. A provider which contains a list of static services. A single service definition within the service list. The name of this provider. A definition of a single static service. A single attribute in this attribute list. The abstract type of the service being advertised. The name of the authority which defined the abstract service type. The concrete URI of the service being advertised. The name of the authority which defined the concrete URI scheme. A service's attribute definition. The attribute name. The attribute value. A list of providers.