STConvert Analysis for Elasticsearch and OpenSearch

STConvert is analyzer that convert Chinese characters between Traditional and Simplified. It supports major versions of Elasticsearch and OpenSearch. Maintained and supported with ❤️ by INFINI Labs.

The plugin includes analyzer: stconvert, tokenizer: stconvert, token-filter: stconvert, and char-filter: stconvert

Optional Parameters

Supported config:

• convert_type: default s2t ,optional option:

  1. s2t ,convert characters from Simple Chinese to Traditional Chinese
  2. t2s ,convert characters from Traditional Chinese to Simple Chinese

• keep_both:default false ,

• delimiter:default ,

Quick Start

Quick example:

PUT /stconvert/
{
    "settings" : {
        "analysis" : {
            "analyzer" : {
                "tsconvert" : {
                    "tokenizer" : "tsconvert"
                    }
            },
            "tokenizer" : {
                "tsconvert" : {
                    "type" : "stconvert",
                    "delimiter" : "#",
                    "keep_both" : false,
                    "convert_type" : "t2s"
                }
            },   
             "filter": {
               "tsconvert" : {
                     "type" : "stconvert",
                     "delimiter" : "#",
                     "keep_both" : false,
                     "convert_type" : "t2s"
                 }
             },
            "char_filter" : {
                "tsconvert" : {
                    "type" : "stconvert",
                    "convert_type" : "t2s"
                }
            }
        }
    }
}

Analyze tests

GET stconvert/_analyze
{
  "tokenizer" : "keyword",
  "filter" : ["lowercase"],
  "char_filter" : ["tsconvert"],
  "text" : "国际國際"
}

Output：
{
  "tokens": [
    {
      "token": "国际国际",
      "start_offset": 0,
      "end_offset": 4,
      "type": "word",
      "position": 0
    }
  ]
}

Normalizer usage

DELETE index
PUT index
{
  "settings": {
    "analysis": {
      "char_filter": {
        "tsconvert": {
          "type": "stconvert",
          "convert_type": "t2s"
        }
      },
      "normalizer": {
        "my_normalizer": {
          "type": "custom",
          "char_filter": [
            "tsconvert"
          ],
          "filter": [
            "lowercase"
          ]
        }
      }
    }
  },
  "mappings": {
    "properties": {
      "foo": {
        "type": "keyword",
        "normalizer": "my_normalizer"
      }
    }
  }
}

PUT index/_doc/1
{
  "foo": "國際"
}

PUT index/_doc/2
{
  "foo": "国际"
}

GET index/_search
{
  "query": {
    "term": {
      "foo": "国际"
    }
  }
}

GET index/_search
{
  "query": {
    "term": {
      "foo": "國際"
    }
  }
}

Community

Fell free to join the Discord server to discuss anything around this project:

https://discord.gg/4tKTMkkvVX

License

Copyright ©️ INFINI Labs.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.