elasticsearch/docs/reference/text-analysis/analysis-classic-tokenfilter.md

---

navigation_title: "Classic" mapped_pages:

• https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-classic-tokenfilter.html ---

Classic token filter [analysis-classic-tokenfilter]

Performs optional post-processing of terms generated by the classic tokenizer.

This filter removes the english possessive ('s) from the end of words and removes dots from acronyms. It uses Lucene’s ClassicFilter.

Example [analysis-classic-tokenfilter-analyze-ex]

The following analyze API request demonstrates how the classic token filter works.

GET /_analyze
{
  "tokenizer" : "classic",
  "filter" : ["classic"],
  "text" : "The 2 Q.U.I.C.K. Brown-Foxes jumped over the lazy dog's bone."
}

The filter produces the following tokens:

[ The, 2, QUICK, Brown, Foxes, jumped, over, the, lazy, dog, bone ]

Add to an analyzer [analysis-classic-tokenfilter-analyzer-ex]

The following create index API request uses the classic token filter to configure a new custom analyzer.

PUT /classic_example
{
  "settings": {
    "analysis": {
      "analyzer": {
        "classic_analyzer": {
          "tokenizer": "classic",
          "filter": [ "classic" ]
        }
      }
    }
  }
}