- com.airplaneian.contrail.temp.defs defs An airport, airfield, or landing site referenced by a flight record. Every field is optional, and absent means unknown or not applicable. The identifier fields come from different systems and a place may have any combination of them, so write each one the place actually has. A place with no published identifier is described by 'name' and 'geo' alone.
- com.airplaneian.contrail.temp.flight record An assertion that a particular flight existed, rather than a personal log entry about the author. Only 'createdAt' is required. Every other field is optional, and absent means unknown or not applicable rather than empty or zero. The exception is 'relationship', where absent means no claim is being made. Records of the same flight written by different people are expected, so write the identifying fields consistently. Any kind of flying is in scope, and origin may equal destination.
- com.airplaneian.contrail.temp.trip record An assertion that a set of flights belonged to one journey. Only 'createdAt' is required, and absent means unknown or not applicable. The reference points one way only, from trip to flight, and a trip references only flight records the author wrote.