Another description of a language considers the set of possible grammatical relations in a language or in general, and how they behave in relation to each other in the morphosyntactic alignment of the language. The description of grammatical relations can also reflect transitivity, passivization, and head-dependent-marking or other agreement. Languages have different criteria for grammatical relations, and e.g. subjecthood criteria can have implications for how the subject is referred to from a relative clause or coreferential with an element in an infinite clause.