Re: [eclipse-clp-users] ECLiPSe features for interactive configuration

From: Kish Shen <kisshen_at_...5...>
Date: Thu, 28 Aug 2008 17:57:55 +0100
> Some support is provided for monitoring violated constraints in 
> libraries: lib(repair) and the newer lib(tentative). Note that these are
> libraries and you need to write your own code (in ECLiPSe) to use them,
> and are not `ready-made' tools.

I should have said that these tools are mainly for when you have a 
complete assignment, i.e. have assigned some value for each problem 
variable (in this case, the assignments are `tentative' and does not 
bind the variable, in keeping with the logical semantics).

With propagation based constraint solvers, it is probably more normal to 
not have a complete assignment as above. Instead, it is probably more 
common to label the variables one by one, propagating the consequences 
after each labelling, and if this leads to failure, backtrack and try to 
label the last variable to a different value.



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Received on Thu Aug 28 2008 - 09:58:04 CEST

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