The subject matter of this specification can be embodied in, among other things, a process that includes defining software travel objects that are configurable to represent a variety of types of accommodations used in transportation of passengers, associating the software travel objects with configurable properties that specify accommodation attributes that affect a passenger's experience during travel, and receiving, through a user interface, information used to customize the configurable properties during run-time of a software application that manages travel reservations for accommodations. The process also includes outputting the customized configurable properties for use by a user in a selection of one or more of the accommodations during a travel reservation.