Attempto Controlled English (ACE) – a subset of English
that can be unambiguously translated into first-order logic – is a knowledge representation language. To support automatic reasoning in ACE
we have developed the Attempto Reasoner RACE (Reasoning in ACE).
RACE proves that one ACE text is the logical consequence of another
one, and gives a justification for the proof in ACE. Variations of the
basic proof procedure permit query answering and consistency checking.
Reasoning in RACE is supported by auxiliary first-order axioms and by
evaluable functions. The current implementation of RACE is based on
the model generator Satchmo.