Provided by: libsearch-xapian-perl_22.214.171.124-2_amd64
Search::Xapian::TradWeight - Traditional Probabilistic Weighting scheme.
Traditional Probabilistic Weighting scheme, as described by the early papers on Probabilistic Retrieval. BM25 generally gives better results.
new Constructor. Either takes no parameters, or a single non-negative parameter k. If k isn't specified, the default value used is 1.