IFOPT, similarly to Transmodel specifies a data model, whereas the primary aim of NeTEx is to define data exchange format. IFOPT has been integrated into the latest version of Transmodel (v6) and thus (see above) builds the basis for the NeTEx physical submodel dedicated to Fixed Objects for Public Transport. This data domain is concerned with particular different types of sites (and their components), such as points of interest, parking or stops and related objects like equipment, for instance, but also pedestrian navigation paths and takes into account accessibility characteristics. NeTEx specifies the exchange of the data defined by the IFOPT model.