Agreement obtains between two constituents when the formal expression of one of them (say, B) depends on some independently varying property (say, Gender) of the other constituent (A). In such a case we say that B agrees with A in Gender. A may be called the “Source”, B the “Target” of the agreement relation, and Gender would (in this case) be the category of A to which B is sensitive […]: (15) ‘Target’ ‘Source’ ‘Category’ B agrees with A in Gender […].
- Dik (1989), a pag.316-317