Theta Theory

题元理论

One of the (sub-) theories of government-binding theory. Its main principle is the theta-criterion, which requires that every argument is assigned just one theta role and that every theta role is assigned to just one argument. Its main role is to determine the positions to which NP-movement is possible.

管辖与约束理论的几个子理论之一。其主要原则是题元标准，它规定每个主目只指派有一个题元角色，而每个题元角色只指派给一个主目。这个理论的主要作用是决定哪些位置适用NP-移位。