clarify the assertion from:   Authorization "The  most common  scenario is where Task can (and even should) exist without an authorization. Task is used alone when there is no need for a formal authorization (order). In other situations when an authorization is needed, the  Task.basedOn  element references either a  CommunicationRequest  or  ServiceRequest  to represent the authorization for data to flow. Both of these use cases ( with and without authorization) are illustrated in the examples below." to    Formal Request To Share Data "There are situations where one must provide formal authorization for each individual data request.  In other cases  an overall data sharing agreement makes the need for such individual authorizations unnecessary.  Where such individual authorizations are not required, Task can be used alone.  When a formal request for the information to be shared is needed, it is represented by either a  CommunicationRequest  or  ServiceRequest  and referenced by Task using the the  Task.basedOn  element.  Use cases with and without authorization are illustrated in the examples below."