<xsd:documentation>Defines the node to which this port is connected.
A timestamp activates and deactivates the connection.
Only one connectedNode should be active at any one point in time.
There are no semantics for the node except common connection.
All ports that are connected to a node with the the same name are inherently connected to each other.
The name of the node is only required to be unique within the context of the
current Product Flow Network (that is, not the overall model).
All ports must be connected to a node and whether or not any other port is connected
to the same node depends on the requirements of the network.
Any node that is internally connected to only one port is presumably a candidate
to be connected to an external node.
The behavior of ports connected at a common node is as follows:
a) There is no pressure drop across the node. All ports connected to the node have
the same pressure. That is, there is an assumption of steady state fluid flow.
b) Conservation of mass exists across the node. The mass into the node via all
connected ports equals the mass out of the node via all connected ports.
c) The flow direction of a port connected to the node may be transient. That is, flow
direction may change toward any port(s) if the relative internal pressure of
the Product Flow Units change and a new steady state is achieved.</xsd:documentation>