OARIS — No Upper Bound for Plots a Sensor Track is based on

There was modelling rule (from the REG's proposal for OARIS) that relationship multiplicities targeting sequences in the IDL PSM all had upper bounds defined. This was achieved by using a Length Tag. There is no such Tag for the 'based on' association role relating sensor_track_type to sensor_plot_type. As a consequence, implementations cannot bound the number of plots that a track may be based on.

Implementation decision to constrain number of plots a track can be based on

It shall be an implementation decision to constrain the number of plots a track can be based on. Including such a constraint in the standard may reduce the standard's applicability and doesn't overly reduce interoperability.