Differential argument marking

In linguistics, differential argument marking (DAM) is the phenomenon of a language's encoding a single grammatical function (e.g. subject or object) in different ways. It includes non-uniform encoding of arguments in terms of case marking, but also in terms of the presence or absence of agreement on the verb. The term differential marking – specifically differential object marking or DOM – was coined by Georg Bossong in relation to his work on Sardinian and New Iranian languages. However, in recent years there has been a growing interest in the great variety of differential marking patterns across the world's languages in both formal and functional linguistics.