Intelligent authoring shell based on Web services

E-learning is on the crossroad between information and communication technology on one side and education on the other. Intelligent authoring shells are kind of e-learning systems capable for generating intelligent tutoring systems. Web services, as standard for describing, publishing, finding and binding application interfaces, could raise e-learning systems into a higher level enabling communication between learning systems regardless of used application platforms. xTEx-Sys is intelligent authoring shell completely oriented on Web services. This paper describes functional requirements and architecture of xTEx-Sys system.