1 Scope
This document establishes the XML encoding of the method of Location Referencing used by TPEG applications.
TPEG applications contain the information required by a client TPEG decoder (i.e. both Location Referencing and event information), to present all the information intended for the end-user when it was originated by the service provider.
Location Referencing requires a service provider to give an impression or image, to the human end-user, of where an event has taken place. This cannot be done easily because the human end-user may or may not be familiar with the location. tpeg -loc has the added challenge of attempting to be as language independent as possible. This is achieved by the use of tpeg -loc tables (essentially word-oriented data object dictionaries).
tpeg -loc is the recommended Location Referencing system for TPEG . It provides location data in a machine readable form that allows a “thick” client such as a navigation system to map-match, on-the-fly, to locate the event being described onto a digital map display. However, it is possible to additionally use other location methods, such as the ‘Link-id’ method by suitably modifying the tpegML .dtd to include the relevant lines, e.g.:
<!ENTITY % link-idML PUBLIC "-//EBU//DTD tpeg-locML//EN" "link-idML.dtd">
%link-idML;
It is vital, for further understanding of this document, to have more than a passing understanding of the tpeg -loc ...
Open preview (PDF)Traffic and travel information (TTI). TTI via transport protocol experts group (TPEG) extensible markup language (XML) - tpeg-locML
