Ken-ichi Seto's paper argues for a clear conceptual distinction between metonymy and synecdoche. Despite the current interest in these tropes, they have not yet been defined in a satisfactory fashion. According to Seto, the reason for this lack of precision resides in the confusion between taxonomies and partonomies. Taxonomies involve "kind of" relations in a hyponymically-structured conceptual domain (e.g., 'a ham sandwich is a kind of food'), whereas partonomies involve "part of" relations in the physical world (as in 'an arm is a part of the body'). Seto calls the former relations, which are defined by semantic inclusion, C-relations (category relations); the latter relations, which are constituted by spatio-temporal contiguity between entities in the physical world, are called E-relations (entity relations). Seto proposes to reserve the term 'synecdoche' for C-relations and 'metonymy' for E-relations. On the basis of this distinction, he develops classifications of metonymic and synecdochic relations. (Klaus-Uwe Panther and Günter Radden)