elasticsearch settings file

settings.json

{
    "analysis": {
        "analyzer": {
            "keyword_lowercase": {
                "type": "custom",
                "tokenizer": "keyword",
                "filter": ["lowercase"]
            },
            "keyword_lowercase_truncate": {
                "type": "custom",
                "tokenizer": "keyword",
                "filter": ["lowercase", "custom_truncate"]
            },
            "text_ascii": {
                "type": "custom",
                "tokenizer": "whitespace",
                "filter": [
                    "asciifolding",
                    "lowercase",
                    "custom_word_delimiter"
                ]
            }
        },
        "filter": {
            "custom_word_delimiter": {
                "type": "word_delimiter",
                "generate_word_parts": true,
                "generate_number_parts": false,
                "catenate_numbers": true,
                "catenate_words": false,
                "split_on_case_change": false,
                "split_on_numerics": false,
                "stem_english_possessive": false
            },
            "custom_truncate": {
                "type": "truncate",
                "length": "20"
            }
        }
    }
}