A NetworkFunction is a functional block within a network infrastructure that has well-defined external interfaces and well-defined functional behaviour. A functional block within a network infrastructure that has well-defined external interfaces and well-defined functional behaviour. NOTE: In practical terms, a Network Function is today often a network node or physical appliance The NfIndicator class defines the indicator the NF supports The human readable name of the NfIndicator. Defines the allowed values or value ranges of this indicator. Describe the source of the indicator. The possible values are: • VNF, • EM, • Both. This tells the consumer where to send the subscription request. Describe the source of an indicator.