|Documentation||the tuple of references to the tunnel gate and its state|
|Children||any (0..*), designator (0..*), refersToTunnelGate (1..1)|
Elements may have different parent elements. As a consequence they may be used in different contexts.
Please, consider this as well as a user of this wiki as when developing this documentation further.
Aspects that are only relevant with respect to one of several parents should be explained exclusively in the documentation of the respective parent element.