Specialized Information Extraction: Automatic Chemical Reaction Coding From English Descriptions

In an a ge of i n c r e a s e d a t t e n t i o n to t h e p r o b l e m s of d a t a b a s e o r g a n l z a t i o n , r e t r i e v a l p r o b l e m s and q u e r y l a n g u a g e s , one of t he m a j o r economic p r o b l e m s of many p o t e n t i a l d a t a b a s e s r e m a i n s t h e e n t r y of t h e original i n f o r m a t i o n i n t o t h e d a t a b a s e . Specialized information e x t r a c t i o n (S IE) s y s t e m s a r e t h e r e f o r e of p o t e n t i a l i m p o r t a n c e i n t h e e n t r y of i n f o r m a t i o n t h a t i s a l r e a d y a v a i l a b l e i n c e r t a i n r e s t r i c t e d t y p e s of n a t u r a l l a n g u a g e t e x t . Th is p a p e r c o n t a i n s a d i s c u s s i o n of t he p r o b l e m s of e n E l n e e r i n g such s y s t e m s and a d e s c r i p t i o n of a p a r t i c u l a r SIE s y s t e m , d e s i g n e d to e x t r a c t i n f o r m a t i o n r e g a r d i n g c h e m i c a l r e a c t i o n s f rom e x p e r i m e n t a l s e c t i o n s of p a p e r s i n t h e c h e m i c a l l i t e r a t u r e and to p r o d u c e a d a t a s t r u c t u r e c o n t a i n i n g t h e r e l e v a n t i n f o r m a t i o n .