The Role of Semantic Type in Differential Object Marking

Spanish, like many other languages (e.g. Hindi), exhibits differential object marking (DOM). It is well-known that DOM seems to be sensitive to the animacy and/or specificity of the direct object (Bossong 1985, Aissen 2003). It is argued here that the Spanish prepositional accusative, or a-marking, is a realization of the features [+accusative] and [+animate] within a nominal projection containing a determiner (D). Nominal projections lacking D are property-denoting and are not a-marked. I show that there is a direct map between the presence or absence of a-marking and the semantic type of the (animate) direct object nominal.