Idx AutoInc NOT NULL,
xCrewShift Integer NOT NULL DESCRIPTION 'link to CrewShift.Idx',
xCrewAccommodation Integer NOT NULL DESCRIPTION 'link to CrewAccommodation.Idx',
AccommodationDay Byte NOT NULL DESCRIPTION 'TAccommodationDay = (adBeforeShift, adOnShift, adAfterShift)',
RoomDesignation VarChar(20) DESCRIPTION 'the room number booked',