diff --git a/docs/reference/index-modules/similarity.asciidoc b/docs/reference/index-modules/similarity.asciidoc index afc3b6556c67d..51a01b5b7c7e8 100644 --- a/docs/reference/index-modules/similarity.asciidoc +++ b/docs/reference/index-modules/similarity.asciidoc @@ -5,6 +5,8 @@ A similarity (scoring / ranking model) defines how matching documents are scored. Similarity is per field, meaning that via the mapping one can define a different similarity per field. +Similarity is only applicable for text type and keyword type fields. + Configuring a custom similarity is considered an expert feature and the builtin similarities are most likely sufficient as is described in <>.