4.5 Running CLLS

This section introduces the driver predicate clls/0 for CLLS-based semantic construction, and contains links to all files needed for running the program.

clls.pl: View Download

Now, it is time to present the driver predicate clls. Here it is:

clls :-
        readLine(Sentence),
        parse(Sentence,UsSem),
        resetVars,vars2atoms(UsSem),
%        printRepresentations([UsSem]),
        solve(UsSem,Sems),
%        printRepresentations(Sems),
        usr2LambdaList(Sems,LambdaTerms),
%        printRepresentations(LambdaTerms),
        betaConvertList(LambdaTerms,Converted),
        printRepresentations(Converted).

You have already seen the first three calls triggering the semantics construction and instantiating the Prolog variables in Section 2.5. Once we have constructed the constraint, solve/2 computes all its solved forms. Finally, usr2LambdaList/2 translates the list of solved forms to a list of "traditional" -terms. All that is left to do is to -convert these terms.

You may uncomment any of the calls of printRepresentations/1 if you wish to inspect the constraint graphs more closely. For the above example, it will look like this: clls(verbose,[every,owner,of,a,siamese,cat,loves,a,therapist]).

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