Editorial (Special issue on Authoring of adaptive hypermedia)

This paper briefly describes the important topic of Authoring of Adaptive Hypermedia that is central to this Special Issue especially from the point of view of education, as well as the papers selected and the reason for this selection. The papers are based on selected, invited papers of the second Workshop on Authoring of Adaptive and Adaptable Educational Hypermedia at the Adaptive Hypermedia conference (AH’04), Eindhoven, The Netherlands, but went through a separate review process for this Special Issue.