ISO/TS 24530-4:2006 establishes the XML encoding of the method of the Public Transport Information application.

The Public Transport Information application is intended to cover all modes of public (i.e. collective) transport as well as inter-urban and intra-urban travel. The application itself is designed to allow the efficient and language-independent transmission of public transport information either directly to an end-user, be it the public or another service provider, such as broadcasters, service operators or other information disseminating points, or to centres for onward transmission.