2. Designing virtual environments for learning and training

2.1 Features of EVAH architecture

Because of the diversity of domains and contexts, the conceptual and technical architectures of EVAHs are manifold. In some cases, these architectures are fairly generic, while in others they are rather ad hoc, adapted only to the context for which they were designed. These architectures are also conditioned by the technical environment already in place. Consequently, this section will not describe the various technical bricks or conceptual layers of an EVAH architecture, but rather present the main points that designers should consider when designing an EVAH to achieve the following objectives:

• facilitate the maintenance and reuse of developed environments; and

• offer...