From d90d9859a2fe90587828a683f729307c9ce6af36 Mon Sep 17 00:00:00 2001 From: ashwinkumar12345 Date: Mon, 16 Aug 2021 11:00:48 -0700 Subject: [PATCH] minor changes --- _opensearch/rest-api/explain.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/_opensearch/rest-api/explain.md b/_opensearch/rest-api/explain.md index c8bf880b..3d94872d 100644 --- a/_opensearch/rest-api/explain.md +++ b/_opensearch/rest-api/explain.md @@ -9,7 +9,7 @@ nav_order: 140 Introduced 1.0 {: .label .label-purple } -Wondering why a specific document matches (or doesn’t match) a query? You can use the explain API for an explanation of how the relevance score (`_score`) is calculated for every result. +Wondering why a specific document ranks higher (or lower) for a query? You can use the explain API for an explanation of how the relevance score (`_score`) is calculated for every result. OpenSearch uses a probabilistic ranking framework called [Okapi BM25](https://en.wikipedia.org/wiki/Okapi_BM25) to calculate relevance scores. Okapi BM25 is based on the original [TF/IDF](http://lucene.apache.org/core/4_0_0/core/org/apache/lucene/search/package-summary.html#scoring) framework used by Apache Lucene.