GML and Mozilla's Mark Up

Graffiti Markup Language (.gml) is a universal, XML-based, open file format designed to store graffiti motion data (x coordinates, y coordinates and time). GML is intended to be a simple bridge between ink and code, promoting collaborations between graffiti writers and hackers.

GML was primarily used in Mozilla's Mark Up site: https://markup.mozilla.org

For more information on .gml, and ways of connecting your Mark with other projects, go to http://graffitimarkuplanguage.com