This function will break up a construct into constituent leaf and composite constructs, e.g. if OMPD_c_d_e and OMPD_d_e are composite constructs, then OMPD_a_b_c_d_e will be broken up into the list {OMPD_a, OMPD_b, OMPD_c_d_e}.
Implement helper functions to identify leaf, composite, and combined constructs.