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[DOCS] Clarify phrase suggester docs smoothing parameter #42947

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Jun 11, 2019
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[DOCS] Clarify phrase suggester docs smoothing parameter #42947

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[DOCS] Clarify phrase suggester docs smoothing parameter
javanna Jun 6, 2019
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add example
javanna Jun 6, 2019
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javanna Jun 7, 2019
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27 changes: 26 additions & 1 deletion docs/reference/search/suggesters/phrase-suggest.asciidoc
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Expand Up @@ -267,7 +267,10 @@ POST _search

The `phrase` suggester supports multiple smoothing models to balance
weight between infrequent grams (grams (shingles) are not existing in
the index) and frequent grams (appear at least once in the index).
the index) and frequent grams (appear at least once in the index). The
smoothing model can be selected by setting the `smoothing` parameter
to one of the following options. Each smoothing model supports specific
properties that can be configured.

[horizontal]
`stupid_backoff`::
Expand All @@ -288,6 +291,28 @@ the index) and frequent grams (appear at least once in the index).
All parameters (`trigram_lambda`, `bigram_lambda`, `unigram_lambda`)
must be supplied.

[source,js]
--------------------------------------------------
POST _search
{
"suggest": {
"text" : "obel prize",
"simple_phrase" : {
"phrase" : {
"field" : "title.trigram",
"size" : 1,
"smoothing" : {
"laplace" : {
"alpha" : 0.7
}
}
}
}
}
}
--------------------------------------------------
// CONSOLE

==== Candidate Generators

The `phrase` suggester uses candidate generators to produce a list of
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