I am also interested in this question.
I have found a fairly old code snippet  to calculate the cosine
similarity in lucene, but I was wondering if elasticsearch provided an
easier API to access this information.
I'm using elasticsearch to index documents and then, with an other
I score similarity using the "more_like_this" query.
Just two questions:
Does the "more_like_this" query use cosine similarity to score documents
(I've read the documentation, but I'm still not sure)?
There is a way to get the scores between 0 and 1?
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