Résumé
Scientists of the environmental domains (biology, geographical information, etc.) need to capitalize, distribute and validate theirscientic experiments. A multi-function platform will be an adaptable candidate for meeting the challenges.We have designed and implementedthe MDweb platform [3] which is nowadays used in various environmental projects. Our main objective is to integrate a workow environment.In this paper, an introduction to a three-level workfow environment architecture (static, intermediate, dynamic) is presented. We focus on the"static" level, which concerns the rst phase of constructing a business process chain, and discuss around the "intermediate" level, which coversboth the instantiation of a business process chain and the validation, in terms of conformity, of the generated chain.