The ARL Gateway outputs location data via the Simple Vehicle Location Protocol (SVLP) - a simple, human-readable, ASCII format using comma separated variables which is easy to parse and process, or the Thorcom Resource Location Protocol (TRLP) a well defined XML protocol.

Both SVLP and TRLP include the following information elements:^*

	Callsign/unit identity
	Time-stamp
	Position (Latitude, Longitude, Altitude)
	Position (Cartesian co-ordinantes, eg. OSGB36, UTM, etc.)
	Speed and Heading (m/s and degrees)
	Reason for location update (timed, distance, alarm...)
	Status
	Position quality (PDOP)

(* where supported by the source of location data)

Thorcom's Simple Vehicle Location Protocol (SVLP) was developed in 1994 to represent GPS location data sent by ambulance mobile data systems to command and control systems. The protocol is a simple EDI like ASCII protocol with comma separated variables that is both easy to read and easy to process in a wide range of computer programming languages and is still widely used at the time of writing.

Example:

Thorcom Resource Location Protocol (SVLP) was developed in 2006 to represent GPS location data sent by ARL Gateways and mobile data systems in Extensible Markup Language (XML). TRLP is a well defined XML impelementation that can be validated with an XSD and parsed with a ... <more words here ...>

Example: