NaPTAN is maintained by the Department of Transport. The NaPTAN XML Schema NaPTAN data is described by a NaPTAN XML Schema. This can be used to describe NaPTAN data when exchanging it between systems as XML documents. It is versioned so that different generations of data can be managed. See http://www.dft.gov.uk/naptan/schema/2.4/NaPTAN.xsd NaPTAN Conceptual Model The NPTG & NaPTAN data conform to a family of consistent, interlocking data models. The models are described in the NPTG & NaPTAN Schema Guide in UML notation. NaPTAN Stops NaPTAN Stop Numbering NaPTAN identifiers are a systematic way of identifying of all UK points of access to public transport or "Stop points"). Every UK rail station, bus and coach terminus, airport, ferry terminal, individual bus stop, tram stop, and taxi rank is allocated a unique NaPTAN Identifier. For large interchanges & termini, NaPTAN points identify the entrances from the public thoroughfare – one identifier is distinguished as the main entrance. Platforms may also be individually identified Every local authority has been allocated a unique prefix for their stop numbering, this ensures that stop numbers cannot be duplicated, in addition there are national number prefixes - 900 for coach stops, 910 for railway stations, 920 for airports, 930 for ferry terminals and 940 for metro and tram stops, the national stop numbers are created centrally and not by local authorities. In England stop details are provided by 87 local authorities and are prefixed with numbers ranging between 010 and 490. In Wales stop details are provided by 22 local authorities and are prefixed with numbers ranging between 511 and 582. In Scotland stop details are provided by 32 local authorities and are prefixed with numbers ranging between 601 and 690. NaPTAN Stop Descriptors NaPTAN stop points have a number of text descriptor elements associated with them: not just a name, but also additional labels and distinguishing identifiers that will help users to recognise them. These elements can be combined in different ways to provide presentations of names useful for many different contexts, for example on maps, stop finders, timetables etc., and on mobile devices Stop Points may have a Common Name, Short name, Landmark, Street, Asset code, etc. Stop Points may also have alternative names, for example for aliases for different national languages. Stop Names may have a qualifier to distinguish them from other stops within the same group of stops. For example, Bus Station (Stand