This booklet proposes and illustrates through concrete examples some principles aimed at encouraging a better taking in account of the plurality of visions of ecologisation in the approaches for supporting agri-food transitions. This issue, which is not yet well addressed in the available guides and current approaches, is nevertheless central because it has a strong influence on the transition process. Indeed, the greater or lesser extent to which the plurality of visions is taken into account will promote or, on the contrary, weaken both the ambition and the scope of the transition.

Introduction
Territorial agri-food transitions are by nature multi-actor dynamics since they involve actors, networks and organizations embodying the different "links" of agri-food systems. An agri-food transition with an ecologisation ambition requires systemic transformations of territorial food systems. However, actors generally have different and sometimes opposite visions of the desirable transition and of ecologisation, which is often remain implicit behind other transition issues considered to be priorities (e.g., relocalization).