OpenSearch/docs/reference/analysis/analyzers/keyword-analyzer.asciidoc
Christoph Büscher 25aac4f77f
Remove include_type_name in asciidoc where possible (#37568)
The "include_type_name" parameter was temporarily introduced in #37285 to facilitate
moving the default parameter setting to "false" in many places in the documentation
code snippets. Most of the places can simply be reverted without causing errors.
In this change I looked for asciidoc files that contained the
"include_type_name=true" addition when creating new indices but didn't look
likey they made use of the "_doc" type for mappings. This is mostly the case
e.g. in the analysis docs where index creating often only contains settings. I
manually corrected the use of types in some places where the docs still used an
explicit type name and not the dummy "_doc" type.
2019-01-18 09:34:11 +01:00

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[[analysis-keyword-analyzer]]
=== Keyword Analyzer
The `keyword` analyzer is a ``noop'' analyzer which returns the entire input
string as a single token.
[float]
=== Example output
[source,js]
---------------------------
POST _analyze
{
"analyzer": "keyword",
"text": "The 2 QUICK Brown-Foxes jumped over the lazy dog's bone."
}
---------------------------
// CONSOLE
/////////////////////
[source,js]
----------------------------
{
"tokens": [
{
"token": "The 2 QUICK Brown-Foxes jumped over the lazy dog's bone.",
"start_offset": 0,
"end_offset": 56,
"type": "word",
"position": 0
}
]
}
----------------------------
// TESTRESPONSE
/////////////////////
The above sentence would produce the following single term:
[source,text]
---------------------------
[ The 2 QUICK Brown-Foxes jumped over the lazy dog's bone. ]
---------------------------
[float]
=== Configuration
The `keyword` analyzer is not configurable.
[float]
=== Definition
The `keyword` analyzer consists of:
Tokenizer::
* <<analysis-keyword-tokenizer,Keyword Tokenizer>>
If you need to customize the `keyword` analyzer then you need to
recreate it as a `custom` analyzer and modify it, usually by adding
token filters. Usually, you should prefer the
<<keyword, Keyword type>> when you want strings that are not split
into tokens, but just in case you need it, this would recreate the
built-in `keyword` analyzer and you can use it as a starting point
for further customization:
[source,js]
----------------------------------------------------
PUT /keyword_example
{
"settings": {
"analysis": {
"analyzer": {
"rebuilt_keyword": {
"tokenizer": "keyword",
"filter": [ <1>
]
}
}
}
}
}
----------------------------------------------------
// CONSOLE
// TEST[s/\n$/\nstartyaml\n - compare_analyzers: {index: keyword_example, first: keyword, second: rebuilt_keyword}\nendyaml\n/]
<1> You'd add any token filters here.