Apart from management of Telemedicine Packages which comprises PlanDefinition, ActivityDefinition, possibly (likely) Questionnaire and possibly Library, the uses of these resources are described in the Clinical Domain:
Finding a PlanDefinition to apply to a Patient.
Searching and reading details when adjusting a CarePlan.
Searching and reading details in these resources when adhering to a CarePlan.
In addition, there are Infrastructure internal use of the resources, for instance to perform automated processing and other checks.