Sorani analyzer
The built-in sorani analyzer can be applied to a text field using the following command:
PUT /sorani-index
{
"mappings": {
"properties": {
"content": {
"type": "text",
"analyzer": "sorani"
}
}
}
}
Stem exclusion
You can use stem_exclusion with this language analyzer using the following command:
PUT index_with_stem_exclusion_sorani_analyzer
{
"settings": {
"analysis": {
"analyzer": {
"stem_exclusion_sorani_analyzer": {
"type": "sorani",
"stem_exclusion": ["مؤسسه", "اجازه"]
}
}
}
}
}
Sorani analyzer internals
The sorani analyzer is built using the following components:
-
Tokenizer:
standard -
Token filters:
- normalization (Sorani)
- lowercase
- decimal_digit
- stop (Sorani)
- keyword
- stemmer (Sorani)
Custom Sorani analyzer
You can create a custom Sorani analyzer using the following command:
PUT /sorani-index
{
"settings": {
"analysis": {
"filter": {
"sorani_stop": {
"type": "stop",
"stopwords": "_sorani_"
},
"sorani_stemmer": {
"type": "stemmer",
"language": "sorani"
},
"sorani_keywords": {
"type": "keyword_marker",
"keywords": []
}
},
"analyzer": {
"sorani_analyzer": {
"type": "custom",
"tokenizer": "standard",
"filter": [
"lowercase",
"decimal_digit",
"sorani_stop",
"sorani_keywords",
"sorani_stemmer"
]
}
}
}
},
"mappings": {
"properties": {
"content": {
"type": "text",
"analyzer": "sorani_analyzer"
}
}
}
}
Generated tokens
Use the following request to examine the tokens generated using the analyzer:
POST /sorani-index/_analyze
{
"field": "content",
"text": "خوێندنی فەرمی لە هەولێرەوە. ژمارەکان ١٢٣٤٥٦."
}
The response contains the generated tokens:
{
"tokens": [
{
"token": "خوێندن",
"start_offset": 0,
"end_offset": 7,
"type": "<ALPHANUM>",
"position": 0
},
{
"token": "فەرم",
"start_offset": 8,
"end_offset": 13,
"type": "<ALPHANUM>",
"position": 1
},
{
"token": "هەولێر",
"start_offset": 17,
"end_offset": 26,
"type": "<ALPHANUM>",
"position": 3
},
{
"token": "ژمار",
"start_offset": 28,
"end_offset": 36,
"type": "<ALPHANUM>",
"position": 4
},
{
"token": "123456",
"start_offset": 37,
"end_offset": 43,
"type": "<NUM>",
"position": 5
}
]
}