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HTML strip processor

Removes HTML tags from the field. If the field is an array of strings, HTML tags will be removed from all members of the array.

Each HTML tag is replaced with a \n character.

Table 24. HTML Strip Options

Name	Required	Default	Description
`field`	yes	-	The string-valued field to remove HTML tags from
`target_field`	no	`field`	The field to assign the value to, by default `field` is updated in-place
`ignore_missing`	no	`false`	If `true` and `field` does not exist, the processor quietly exits without modifying the document
`description`	no	-	Description of the processor. Useful for describing the purpose of the processor or its configuration.
`if`	no	-	Conditionally execute the processor. See Conditionally run a processor.
`ignore_failure`	no	`false`	Ignore failures for the processor. See Handling pipeline failures.
`on_failure`	no	-	Handle failures for the processor. See Handling pipeline failures.
`tag`	no	-	Identifier for the processor. Useful for debugging and metrics.

{
  "html_strip": {
    "field": "foo"
  }
}

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https://www.elastic.co/guide/en/elasticsearch/reference/7.17/htmlstrip-processor.html