IFOPT (Identification of Fixed Objects in Public Transport) is a CEN Technical Specification that provides a Reference Data Model for describing the main fixed objects required for public access to Public transport, that is to say Transportation hubs (such as airports, stations, bus stops, ports, and other destination places and points of interest, as well as their entrances, platforms, concourses, internal spaces, equipment, facilities, accessibility etc.).
Such a model is a fundamental component of the modern Public transport information systems needed both to operate Public transport and to inform passengers about services.
[1] IFOPT is itself built upon the CEN Transmodel standard and defines four related sub models.
It developed a detailed access model for stations and points of interest.
prCEN Technical Specification Identification of Fixed Objects In Public Transport.