Le blogue de Nicolas Cynober. GPX: the GPS Exchange Format. What is GPX?
GPX (the GPS Exchange Format) is a light-weight XML data format for the interchange of GPS data (waypoints, routes, and tracks) between applications and Web services on the Internet. Current Status The GPX 1.1 schema was released on August 9, 2004. GPX has been the de-facto XML standard for lightweight interchange of GPS data since the initial GPX 1.0 release in 2002.
GPX is being used by dozens of software programs and Web services for GPS data exchange, mapping, and geocaching. Introducing SPARQL: Querying the Semantic Web. November 16, 2005 An Introduction to SPARQL This tutorial, the first of a three-part series, introduces SPARQL -- a query language and data access protocol for the Semantic Web.
SPARQL is defined in terms of the W3C's RDF data model and will work for any data source that can be mapped into RDF.