The HIGHWAY consortium ( developed a GML application schema fully supporting the Geographic Data Files (GDF) data model as well as the GDF feature, attribute and relationship catalogues. They also deployed a WFS enabled service.

Geographic Data Files or GDF is a file format for geographic files. Its primary use is for Automotive navigation systems, but it is very usable for many other transport and traffic applications like fleet management, dispatch management, road traffic analysis, traffic management, Automatic Vehicle Location etc. GDF is a European standard that is used to describe and transfer road networks and road related data. The standard was drawn up by CEN in co-operation with digital map providers, automotive and electronic equipment manufacturers.

More detailed information on this project can be found at:

And at: