R.: A webbased collaborative metamodeling environment with secure remote model access

Abstract. This contribution presents GEMSjax – a web-based meta-modeling tool for the collaborative development of domain specific lan-guages. By making use of modern Web 2.0 technologies like Ajax and REST services, the tool allows for simultaneous web browser-based cre-ation/editing of metamodels and model instances, as well as secure re-mote model access via REST, which enables remote model modification over a simple HTTP-based interface. This paper describes the complex technical challenges we faced and solutions we produced to pro-vide browser-based synchronous model editing. It further explains on the XACML-based access control mechanisms to provide secure remote access to models and model elements. Additionally, we highlight the use-fulness of our approach by describing its application in a realistic usage scenario.