elasticsearch/docs/reference/indices/analyze.asciidoc

[[indices-analyze]]
== Analyze

Performs the analysis process on a text and return the tokens breakdown
of the text.

Can be used without specifying an index against one of the many built in
analyzers:

[source,js]
--------------------------------------------------
curl -XGET 'localhost:9200/_analyze' -d '
{
  "analyzer" : "standard",
  "text" : "this is a test"
}'
--------------------------------------------------

If text parameter is provided as array of strings, it is analyzed as a multi-valued field.

[source,js]
--------------------------------------------------
curl -XGET 'localhost:9200/_analyze' -d '
{
  "analyzer" : "standard",
  "text" : ["this is a test", "the second text"]
}'
--------------------------------------------------

Or by building a custom transient analyzer out of tokenizers,
token filters and char filters. Token filters can use the shorter 'filters'
parameter name:

[source,js]
--------------------------------------------------
curl -XGET 'localhost:9200/_analyze' -d '
{
  "tokenizer" : "keyword",
  "filters" : ["lowercase"],
  "text" : "this is a test"
}'

curl -XGET 'localhost:9200/_analyze' -d '
{
  "tokenizer" : "keyword",
  "token_filters" : ["lowercase"],
  "char_filters" : ["html_strip"],
  "text" : "this is a <b>test</b>"
}'
--------------------------------------------------

It can also run against a specific index:

[source,js]
--------------------------------------------------
curl -XGET 'localhost:9200/test/_analyze' -d '
{
  "text" : "this is a test"
}'
--------------------------------------------------

The above will run an analysis on the "this is a test" text, using the
default index analyzer associated with the `test` index. An `analyzer`
can also be provided to use a different analyzer:

[source,js]
--------------------------------------------------
curl -XGET 'localhost:9200/test/_analyze' -d '
{
  "analyzer" : "whitespace",
  "text : "this is a test"
}'
--------------------------------------------------

Also, the analyzer can be derived based on a field mapping, for example:

[source,js]
--------------------------------------------------
curl -XGET 'localhost:9200/test/_analyze' -d '
{
  "field" : "obj1.field1",
  "text" : "this is a test"
}'
--------------------------------------------------

Will cause the analysis to happen based on the analyzer configured in the
mapping for `obj1.field1` (and if not, the default index analyzer).

All parameters can also supplied as request parameters. For example:

[source,js]
--------------------------------------------------
curl -XGET 'localhost:9200/_analyze?tokenizer=keyword&filters=lowercase&text=this+is+a+test'
--------------------------------------------------

For backwards compatibility, we also accept the text parameter as the body of the request,
provided it doesn't start with `{` :

[source,js]
--------------------------------------------------
curl -XGET 'localhost:9200/_analyze?tokenizer=keyword&token_filters=lowercase&char_filters=html_strip' -d 'this is a <b>test</b>'
--------------------------------------------------