, γ n and β. Consequently, if an elementary tree γ is added to an elementary tree γ, and if there is then a sequence of adjunctions at root or foot nodes starting from γ , then each of these adjunctions can be considered an adjunction at γ, since it takes place at a node shared by γ, γ , and all the subsequently adjoined trees.
one way to define SN-MCTAG refers to the standard TAG derivation tree in the following way.