<xsd:documentation>Whether or not the trajectory is growing.
True ("true" or "1") indicates the that the trajectory is still growing
in size (that is, trajectoryStation values are still being added).
For example, it may be connected to a realtime stream.
False ("false" or "0") indicates that the trajectory is
closed (that is, no further trajectoryStation values will be added).
Not given indicates that the status of the trajectory is not known.
This value is only relevant within the context of a server.</xsd:documentation>