Lucene’s Practical Scoring Function

Relevance tuning is lengthy subject.
This was well explained by Elasticsearch.
Please read all chapters before acting on relevance improvement.

Reference: https://www.elastic.co/guide/en/elasticsearch/guide/current/practical-scoring-function.html

score(q,d) =
queryNorm(q)
· coord(q,d)
· ? (
tf(t in d)
· idf(t)²
· t.getBoost()
· norm(t,d)
) (t in q)

-o-