"simplified_chinese_tokenizer": {
            "type": "fess_simplified_chinese_tokenizer"
        },
        "vietnamese_tokenizer": {
            "type": "fess_vietnamese_tokenizer",
            "sentence_detector": false,
            "ambiguities_resolved": false
        },
        "unigram_tokenizer": {
          "type": "ngram",
          "min_gram": 1,
          "max_gram": 1,
          "token_chars": []