The theoretic~ apparatus of a T A G cons/sin of a primitive~ defined set of "elememary" phrase s m g n u ~ gge~ a Jqinkins'~ l'~lgJOgl thag ~ ~ ~ to d e ~ e dependency relations between two nodes within an elemeutary tree, and an "adjunction" operarlon that combines trees under specifiable constraints. The elementary frees are divided into gwo sets: initLll and auxiliary.