Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!mcsun!unido!uklirb!shell
From: karlth@rhi.hi.is (Karl Thoroddsen)
Newsgroups: comp.ai.shells
Subject: Backward chaining in Shells
Message-ID: <7028@uklirb.UUCP>
Date: 18 Oct 89 12:50:06 GMT
Sender: shell@uklirb.UUCP
Organization: University of Iceland
Lines: 14
Approved: shell@uklirb.uucp
Posted-Date: Thu Oct 19 10:12:32 GMT 1989

I'm currently in the process of writing a shell for the PC computers.
I've finished writing the enviroment for the shell and the internal logic
i.e. the expert system builder inputs his data into a spreadsheet like 
screen and using that information the program then comes up with the
"correct" solution.
Now the problem is that my shell lacks a feature called "backward chaining",
which, according to textbooks, is essential in shells.
But I can't incorperate it into the shell if I don't know what it means!

Could someone send me brief description of what backward chaining does?

Yours faithfully

Karl Thoroddsen    (Computer Science, University of Iceland)