Does BM25 use query coordinator?


(Nariman Esmaiely Fard) #1

In Lucene's practical scoring function there is a query coordinator which punishes documents that fail to match all the query terms. does Okapi BM25 use the same trick?

The reason I'm curious about it is that I'm using Elasticsearch with BM25 similarity module and sometimes I feel this algorithm does not favor documents with more matches. There are cases that a document contains one or two terms a lot, outscores a document containing all query terms.


(system) #2

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