Our w o r k on the p r o c e s s i n ~ of a special kind of linguistic information, namely temporal information ,has led us to advocate the use of can lead to some pointless discussions between different approaches which, at an abstract level, can be s h o w n to be equivalent; secondly, any e x t e n s i o n or modification of the implemented model requires a different program instead of a m e r e a d j u s t m e n t at.