停止词

stop 过滤器会从标记化文本中移除指定的停止词，帮助剔除常见的、意义不大的词。您可以使用stop_words 参数配置停用词列表。

配置

stop 过滤器是 Milvus 的自定义过滤器。要使用它，请在过滤器配置中指定"type": "stop" 以及提供停用词列表的stop_words 参数。

Python

analyzer_params = {
    "tokenizer": "standard",
    "filter":[{
        "type": "stop", # Specifies the filter type as stop
        "stop_words": ["of", "to", "_english_"], # Defines custom stop words and includes the English stop word list
    }],
}

Java

Map<String, Object> analyzerParams = new HashMap<>();
analyzerParams.put("tokenizer", "standard");
analyzerParams.put("filter",
        Collections.singletonList(
                new HashMap<String, Object>() {{
                    put("type", "stop");
                    put("stop_words", Arrays.asList("of", "to", "_english_"));
                }}
        )
);

NodeJS

const analyzer_params = {
    "tokenizer": "standard",
    "filter":[{
        "type": "stop", # Specifies the filter type as stop
        "stop_words": ["of", "to", "_english_"], # Defines custom stop words and includes the English stop word list
    }],
};

Go

analyzerParams = map[string]any{"tokenizer": "standard",
    "filter": []any{map[string]any{
        "type":       "stop",
        "stop_words": []string{"of", "to", "_english_"},
    }}}

cURL

# restful
analyzerParams='{
  "tokenizer": "standard",
  "filter": [
    {
      "type": "stop",
      "stop_words": [
        "of",
        "to",
        "_english_"
      ]
    }
  ]
}'

stop 过滤器接受以下可配置参数。

| 参数

|

说明

| | --- | --- | |

stop_words

|

要从标记化中删除的单词列表。默认情况下，过滤器使用内置的_english_ 词典。您可以通过三种方式覆盖或扩展它：

• 内置词典- 提供以下语言别名之一，以使用预定义词典："_english_","_danish_","_dutch_","_finnish_","_french_","_german_","_hungarian_","_italian_","_norwegian_","_portuguese_","_russian_","_spanish_" 、"_swedish_"

• 自定义列表- 传递您自己的术语数组，如["foo", "bar", "baz"] 。

• 混合列表- 结合别名和自定义术语，如["of", "to", "_english_"] 。

  有关每个预定义词典的具体内容，请参阅stop_words。

|

stop 过滤器对标记化器生成的术语进行操作，因此必须与标记化器结合使用。有关 Milvus 中可用的标记符列表，请参阅标准标记符及其同类页面。

定义analyzer_params 后，可以在定义 Collection Schema 时将其应用到VARCHAR 字段。这样，Milvus 就可以使用指定的分析器对该字段中的文本进行处理，从而实现高效的标记化和过滤。有关详情，请参阅示例使用。

示例

在将分析器配置应用到 Collection 模式之前，请使用run_analyzer 方法验证其行为。

分析器配置

Python

analyzer_params = {
    "tokenizer": "standard",
    "filter":[{
        "type": "stop", # Specifies the filter type as stop
        "stop_words": ["of", "to", "_english_"], # Defines custom stop words and includes the English stop word list
    }],
}

Java

Map<String, Object> analyzerParams = new HashMap<>();
analyzerParams.put("tokenizer", "standard");
analyzerParams.put("filter",
        Collections.singletonList(
                new HashMap<String, Object>() {{
                    put("type", "stop");
                    put("stop_words", Arrays.asList("of", "to", "_english_"));
                }}
        )
);

NodeJS

// javascript

Go

analyzerParams = map[string]any{"tokenizer": "standard",
    "filter": []any{map[string]any{
        "type":       "stop",
        "stop_words": []string{"of", "to", "_english_"},
    }}}

cURL

# restful

验证使用run_analyzerCompatible with Milvus 2.5.11+

Python

from pymilvus import (
    MilvusClient,
)

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

# Sample text to analyze
sample_text = "The stop filter allows control over common stop words for text processing."

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

Java

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("The stop filter allows control over common stop words for text processing.");

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

NodeJS

// javascript

Go

import (
    "context"
    "encoding/json"
    "fmt"

    "github.com/milvus-io/milvus/client/v2/milvusclient"
)

client, err := milvusclient.New(ctx, &milvusclient.ClientConfig{
    Address: "localhost:19530",
    APIKey:  "root:Milvus",
})
if err != nil {
    fmt.Println(err.Error())
    // handle error
}

bs, _ := json.Marshal(analyzerParams)
texts := []string{"The stop filter allows control over common stop words for text processing."}
option := milvusclient.NewRunAnalyzerOption(texts).
    WithAnalyzerParams(string(bs))

result, err := client.RunAnalyzer(ctx, option)
if err != nil {
    fmt.Println(err.Error())
    // handle error
}

cURL

# restful

预期输出

['The', 'stop', 'filter', 'allows', 'control', 'over', 'common', 'stop', 'words', 'text', 'processing']