HTML Strip Char Filter

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The html_strip character filter strips HTML elements from the text and replaces HTML entities with their decoded value (e.g. replacing & with &).

Example outputedit

POST _analyze{  "tokenizer":      "keyword", 

  "char_filter":  [ "html_strip" ],  "text": "<p>I&apos;m so <b>happy</b>!</p>"}

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The keyword tokenizer returns a single term.

The above example returns the term:

[ \nI‘m so happy!\n ]

The same example with the standard tokenizer would return the following terms:

[ I‘m, so, happy ]

Configurationedit

The html_strip character filter accepts the following parameter:

escaped_tags

An array of HTML tags which should not be stripped from the original text.

Example configurationedit

In this example, we configure the html_strip character filter to leave <b> tags in place:

PUT my_index{  "settings": {    "analysis": {      "analyzer": {        "my_analyzer": {          "tokenizer": "keyword",          "char_filter": ["my_char_filter"]        }      },      "char_filter": {        "my_char_filter": {          "type": "html_strip",          "escaped_tags": ["b"]        }      }    }  }}POST my_index/_analyze{  "analyzer": "my_analyzer",  "text": "<p>I&apos;m so <b>happy</b>!</p>"}

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The above example produces the following term:

[ \nI‘m so <b>happy</b>!\n ]


源文：https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-htmlstrip-charfilter.html#analysis-htmlstrip-charfilter

HTML Strip Char Filter