The core of
s oratorios formal structure is the special prominence given to the choir, which is effectively functional in the musical drama, through its close correlation to the aria. Influenced by ancient Greek drama, Händel attributes to the choir the first role. At the same time, he develops the standard ternary form of the da capo aria
into a free dramatic form, combining elements of dramatic expression of both the recitativo
and the aria
. The free dramatic form of
s arias is obviously present in his musical dramas Semele
, in which the composer attempted to reform the musical theater, expanding the dramatic expression beyond the conventional boundaries of the baroque.