a coherent named set of features that a SIRI Functional Service may implement to provide particular application functionality

NOTE Some capabilities are common to all services; others are specific to individual functional services. Each SIRI functional service has a number of required capabilities, a number of capabilities for which alternatives are allowed, and a number of optional capabilities. A Capability Matrix is used both to specify the named capabilities for each SIRI functional service, and for the capabilities common to all SIRI functional services.