Norwegian analyzer
The built-in norwegian analyzer can be applied to a text field using the following command:
PUT /norwegian-index
{
"mappings": {
"properties": {
"content": {
"type": "text",
"analyzer": "norwegian"
}
}
}
}
Stem exclusion
You can use stem_exclusion with this language analyzer using the following command:
PUT index_with_stem_exclusion_norwegian_analyzer
{
"settings": {
"analysis": {
"analyzer": {
"stem_exclusion_norwegian_analyzer": {
"type": "norwegian",
"stem_exclusion": ["autoritet", "godkjenning"]
}
}
}
}
}
Norwegian analyzer internals
The norwegian analyzer is built using the following components:
-
Tokenizer:
standard -
Token filters:
- lowercase
- stop (Norwegian)
- keyword
- stemmer (Norwegian)
Custom Norwegian analyzer
You can create a custom Norwegian analyzer using the following command:
PUT /norwegian-index
{
"settings": {
"analysis": {
"filter": {
"norwegian_stop": {
"type": "stop",
"stopwords": "_norwegian_"
},
"norwegian_stemmer": {
"type": "stemmer",
"language": "norwegian"
},
"norwegian_keywords": {
"type": "keyword_marker",
"keywords": []
}
},
"analyzer": {
"norwegian_analyzer": {
"type": "custom",
"tokenizer": "standard",
"filter": [
"lowercase",
"norwegian_stop",
"norwegian_keywords",
"norwegian_stemmer"
]
}
}
}
},
"mappings": {
"properties": {
"content": {
"type": "text",
"analyzer": "norwegian_analyzer"
}
}
}
}
Generated tokens
Use the following request to examine the tokens generated using the analyzer:
POST /norwegian-index/_analyze
{
"field": "content",
"text": "Studentene studerer ved norske universiteter. Deres nummer er 123456."
}
The response contains the generated tokens:
{
"tokens": [
{"token": "student","start_offset": 0,"end_offset": 10,"type": "<ALPHANUM>","position": 0},
{"token": "studer","start_offset": 11,"end_offset": 19,"type": "<ALPHANUM>","position": 1},
{"token": "norsk","start_offset": 24,"end_offset": 30,"type": "<ALPHANUM>","position": 3},
{"token": "universitet","start_offset": 31,"end_offset": 44,"type": "<ALPHANUM>","position": 4},
{"token": "numm","start_offset": 52,"end_offset": 58,"type": "<ALPHANUM>","position": 6},
{"token": "123456","start_offset": 62,"end_offset": 68,"type": "<NUM>","position": 8}
]
}