<xsd:documentation>Defines the internal node to which this external port is connected.
All ports (whether internal or external) that are connected to a node with the
same name are connected to each other. Node names are unique to each network.
The purpose of the external port is to provide input to or output from the internal network
except when the port is an "exposed" port. The purpose of an exposed port is to allow
the properties of the port to be seen external to the network.
For an exposed port, the connection points to the associated port. </xsd:documentation>