69 lines
2.4 KiB
Plaintext
69 lines
2.4 KiB
Plaintext
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[[query-dsl-mlt-field-query]]
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=== More Like This Field Query
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The `more_like_this_field` query is the same as the `more_like_this`
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query, except it runs against a single field. It provides nicer query
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DSL over the generic `more_like_this` query, and support typed fields
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query (automatically wraps typed fields with type filter to match only
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on the specific type).
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[source,js]
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--------------------------------------------------
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{
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"more_like_this_field" : {
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"name.first" : {
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"like_text" : "text like this one",
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"min_term_freq" : 1,
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"max_query_terms" : 12
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}
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}
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}
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--------------------------------------------------
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`more_like_this_field` can be shortened to `mlt_field`.
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The `more_like_this_field` top level parameters include:
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[cols="<,<",options="header",]
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|=======================================================================
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|Parameter |Description
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|`like_text` |The text to find documents like it, *required*.
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|`percent_terms_to_match` |The percentage of terms to match on (float
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value). Defaults to `0.3` (30 percent).
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|`min_term_freq` |The frequency below which terms will be ignored in the
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source doc. The default frequency is `2`.
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|`max_query_terms` |The maximum number of query terms that will be
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included in any generated query. Defaults to `25`.
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|`stop_words` |An array of stop words. Any word in this set is
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considered "uninteresting" and ignored. Even if your Analyzer allows
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stopwords, you might want to tell the MoreLikeThis code to ignore them,
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as for the purposes of document similarity it seems reasonable to assume
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that "a stop word is never interesting".
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|`min_doc_freq` |The frequency at which words will be ignored which do
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not occur in at least this many docs. Defaults to `5`.
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|`max_doc_freq` |The maximum frequency in which words may still appear.
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Words that appear in more than this many docs will be ignored. Defaults
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to unbounded.
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|`min_word_len` |The minimum word length below which words will be
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ignored. Defaults to `0`.
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|`max_word_len` |The maximum word length above which words will be
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ignored. Defaults to unbounded (`0`).
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|`boost_terms` |Sets the boost factor to use when boosting terms.
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Defaults to `1`.
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|`boost` |Sets the boost value of the query. Defaults to `1.0`.
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|`analyzer` |The analyzer that will be used to analyze the text.
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Defaults to the analyzer associated with the field.
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|=======================================================================
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