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|Packs (add-ons) for SWI-Prolog|
|Title:||Classic CHAT80 Prolog natural language application|
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|Author:||David H.D. Warren <unknown@unknown>|
|Fernando C.N. Pereira <unknown@unknown>|
|Maintainer:||Jan Wielemaker <J.Wielemaker@vu.nl>|
|Packager:||Jan Wielemaker <J.Wielemaker@vu.nl>|
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The CHAT80 system has been developed in the 70s and 80s by Fernando C.N. Pereira and David H.D. Warren. It implements a natural language question answering system that answers questions about the world: countries, cities, rivers, etc. It does so by parsing the question, translate the parse to a Prolog query and run this against its database.
This version is derived from the original via Quintus Prolog after some compatibility modifications for SWI-Prolog and adding a module header that allows using it safely together with other applications.
The code is definitely dated. Still, it provides a nice example using Prolog for parsing, assigning meaning and querying.
The copyright is as far as we know with the original authors and made
available under a classical academic use license. See LICENSE in the
prolog/chat80 directory. The content of that file was copied from the
Python NLTK data package
that includes the chat80 files.
Pack contains 34 files holding a total of 149K bytes.