The eLesson Markup Language (eLML) [1] is an open source XML framework for creating electronic lessons. It is a "spin-off" from the GITTA project [2], a Swiss GIS eLearning project, and was launched in spring 2004. The eLML project is hosted at Sourceforge and offers all the regular tools (CVS, bugtracker, forum etc.) that you might already be familiar with when working with Sourceforge. The aim of eLML was to offer authors a tool that ensured conformity to pedagogical guidelines.