The direction of a component port. defines the protocol of a port, it can be either wire, or cable The protocol type: wire for simple ports, or cable for complex ports Define the type and allow further documentation. list protocol parameters (e.g. template parameters for a systemC protocol) The optional elements left and right can be used to select a bit-slice of a signal vector to map to the bus interface. The optional elements left and right can be used to select a bit-slice of a signal vector to map to the bus interface. A port description, giving a name and an access type for high level ports. The name of the port. The initial or default value on the port. Specifies whether a signal is to be exported out of the module. String for describing the port to users If this element is present, the type of access is restricted to the specified value. If present, indicates how a netlister accesses a port or all the ports of a busInterface If present, a netlister should use this string instead of the port name to access the port Describes port characteristics.