Abstract
The didactic ontology of web didactics enables quality assurance of processes and outcomes in the production of online learning environments. Quality is determined by the people involved in the pedagogical process. The quality assurance process can be supported by software. For these processes of quality assurance, the author brings examples from the learning village (www.lerndorf.de) and the learning environment of the research and development project "Centre for Environmental Knowledge and Education" (ZUB) funded by the German Federal Foundation for the Environment.