Lindera

The lindera tokenizer performs dictionary-based morphological analysis. It is a good choice for languages—such as Japanese, Korean, and Chinese—whose words are not separated by spaces.

Configuration

To configure an analyzer using the lindera tokenizer, set tokenizer.type to lindera and choose a dictionary with dict_kind.

analyzer_params = {
    "tokenizer": {
      "type": "lindera"，
      "dict_kind": "ipadic"
    }
}

Map<String, Object> analyzerParams = new HashMap<>();
analyzerParams.put("tokenizer",
                new HashMap<String, Object>() {{
                    put("type", "lindera");
                    put("dict_kind", "ipadic");
                }});

After defining analyzer_params, you can apply them to a VARCHAR field when defining a collection schema. This allows Milvus to process the text in that field using the specified analyzer for efficient tokenization and filtering. For details, refer to Example use.

Examples

Before applying the analyzer configuration to your collection schema, verify its behavior using the run_analyzer method.

Analyzer configuration

analyzer_params = {
    "tokenizer": {
      "type": "lindera",
      "dict_kind": "ipadic"
    }
}

Map<String, Object> analyzerParams = new HashMap<>();
analyzerParams.put("tokenizer",
                new HashMap<String, Object>() {{
                    put("type", "lindera");
                    put("dict_kind", "ipadic");
                }});

Verification using run_analyzer

from pymilvus import (
    MilvusClient,
)

client = MilvusClient(uri="http://localhost:19530")

# Sample text to analyze
sample_text = "東京スカイツリーの最寄り駅はとうきょうスカイツリー駅で"

# Run the standard analyzer with the defined configuration
result = client.run_analyzer(sample_text, analyzer_params)
print("Standard analyzer output:", result)

import io.milvus.v2.client.ConnectConfig;
import io.milvus.v2.client.MilvusClientV2;
import io.milvus.v2.service.vector.request.RunAnalyzerReq;
import io.milvus.v2.service.vector.response.RunAnalyzerResp;

ConnectConfig config = ConnectConfig.builder()
        .uri("http://localhost:19530")
        .build();
MilvusClientV2 client = new MilvusClientV2(config);

List<String> texts = new ArrayList<>();
texts.add("東京スカイツリーの最寄り駅はとうきょうスカイツリー駅で");

RunAnalyzerResp resp = client.runAnalyzer(RunAnalyzerReq.builder()
        .texts(texts)
        .analyzerParams(analyzerParams)
        .build());
List<RunAnalyzerResp.AnalyzerResult> results = resp.getResults();

Expected output

{tokens: ['東京', 'スカイ', 'ツリー', 'の', '最寄り駅', 'は', 'とう', 'きょう', 'スカイ', 'ツリー', '駅', 'で']}