The AMW (ATLAS Model Weaver) is a tool for establishing relationships (i.e., links) between models. The links are stored in a model, called weaving model. It is created conforming to a weaving metamodel. AMW provides a base weaving metamodel enabling to create links between model elements and associations between links. The metamodel may be extended to add other mapping semantics. This way there is the possibility of creating variable mapping languages dedicated to specific application requirements.