The growing interest in Electronic Commerce practices has lead to a wide va
riety of models trying to capture the subtleties and complexities of the el
ectronic marketplace. In this paper, we discuss a model based on trading co
mmunities, virtual business processes and virtual enterprises. These concep
ts are at the heart of the WISE (Workflow based Internet SErvices) project,
where we have used them to drive the design and implementation of software
tools for business to business electronic commerce. The paper briefly desc
ribes the model and shows how it is being used in practice as part of the W
ISE research effort.