[help-GIFT] algorithms--weighting functions-methods

[Mingchung Liu]

Hi,


 firstly,      When you say change the algorithm, you mean that change the weighting function , right?
        I think there are 3 place to be changed when some one want to apply a new algorithm, they are:

            1, double CWeightingFunction::subApply

(const double inDocumentFrequency,
                    const double inNormalizingFactor)

             2, void CScoreBoard::operator()(const CWeightingFunction& inWF,
                 const CDocumentFrequencyElement& inDFE)

             3, double CWeightingFunction::getTermFrequency()


                            
     Am I right?


 Secondly , in gift-config.mrml, there are algorithm such as "Separate Normalisation" ,"Perl link" . But I cant find the code for these algorithms,  Did Viper implement them?


Thirdly, what is the relationship between algorithm and weighting function ?  And what's the difference? In mrml tag <algorithm>, there are information for both of them.

The last, what tag in mrml   does the Server use to determine which query engine to use ? Can one algorithm be used by two query engine?

Thank you very much.

Cheers,