Application framework development for virtual learning environments

The paper presents the framework development process for a Virtual Learning Environment (VLE). The VLE framework, based on a multi-tier architecture, is a generic solution that allows the creation of different VLE web applications. In this paper we outline the process of the VLE domain framework development, from analysis phase to custom application generation by framework instantiation. We propose and discuss a set of mechanisms for domain analysis and framework design when large-scale applications are considered. The VLE framework is defined as a composition of a set of utility frameworks arranged in a layered architecture. Our approach of framework composition and inter-framework protocol based collaboration is highlighted in the paper. The VLE framework described in the paper has been used to generate customized VLE applications based on specific educational models and requirements.