This read-create TruthValue specifies whether this FlowPoint accepts untagged ingress frames as part of its membership, in addition to whatever tagged VLAN membership it has defined. An administrator enables this when the flow point needs to classify a customer's untagged Ethernet traffic into this specific flow rather than dropping or misclassifying it. For example, enabling untagged-frame support on a flow point serving a customer handoff with no VLAN tagging ensures their plain untagged frames are still recognized as belonging to that flow.