"In addition to differential object marking (see UT010-UT012), languages may also show differential subject marking (DSM). In a broad sense, already a different case of a subject, or a different agreement or position of a subject counts as DSM; in a narrower sense, such differences ought to depend on the features of the subject in some way or other to be regarded as DSM (Woolford 2009:17). In Estonian, the nominative case may be used for identification or conveying a definite amount of something (1a), whereas the partitive case may be used to express an indefinite amount of something (1b)."