GPX

GPX (GPS Exchange Format) is an XML-based format for interchanging GPS (Global Positioning System) data between applications. Version 1.0 was released in 2002, followed by current version 1.1 in 2004.

File identification
GPX files are in XML form, with an opening  tag including a parameter.

Links

 * GPS Exchange Format
 * Official site
 * Schema documentation
 * Validating GPX output
 * Developers' forum
 * Sample files
 * Archived GPX Schema version 1.0