This paper describes the structure and e v a l u a t i o n of the s y n t a c t i c o - s e m a n t i c lexicon (SSL) of the German Natural Language Understanding System VIE-LANG [3]. VIE-LANG uses an SI-Net [2] as internal r e p r e s e n t a t i o n . The SSL c o n t a i n s the rules according to which the mapping between net-structures and surface s t r u c t u r.