Decimal digit token filter

Converts all digits in the Unicode Decimal_Number General Category to 0-9. For example, the filter changes the Bengali numeral ৩ to 3.

This filter uses Lucene’s DecimalDigitFilter.

Example

The following analyze API request uses the decimal_digit filter to convert Devanagari numerals to 0-9:

  GET /_analyze { "tokenizer" : "whitespace", "filter" : ["decimal_digit"], "text" : "१-one two-२ ३" }  

The filter produces the following tokens:

[ 1-one, two-2, 3]

Add to an analyzer

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

  PUT /decimal_digit_example { "settings": { "analysis": { "analyzer": { "whitespace_decimal_digit": { "tokenizer": "whitespace", "filter": [ "decimal_digit" ] } } } } }  