Mapping & Analyzer

mapping

mapping params

• geo_point
  • string “lat,lng”
  • object {lat: “”, lon: “”}
  • geohash
  • array [lng, lat]
  • “POINT(lon lat)”

analyzer

• standard

• simple

  • breaks text into tokens at any non-letter character, such as numbers, spaces, hyphens and apostrophes
  • discards non-letter characters
  • change uppercase to lowercase

• whitespace

• stop

• keyword

  • the keyword analyzer is a “noop” analyzer which returns the entire input string as a single token

• pattern

• language

  • arabic, armenian, basque, bengali, brazilian, bulgarian, catalan, cjk, czech, danish, dutch, english, estonian, finnish, french, galician, german, greek, hindi, hungarian, indonesian, irish, italian, latvian, lithuanian, norwegian, persian, portuguese, romanian, russian, sorani, spanish, swedish, turkish, thai

• fingerprint

  • remove leading and trailing whitespace
  • change all characters to their lowercase representation
  • remove all punctuation and control characters
  • normalize extended western characters to their ASCII representations (for example “gôdel” -> “godel”)
  • split the string into whitespace-separated tokens
  • sort the tokens and remove duplicates
  • join the tokens back together

• n-gram

  • change all characters to their lowercase representation
  • remove all punctuation, whitespace, and control characters
  • obtain all the string n-grams
  • sort the n-grams and remove duplicates
  • join the sorted n-grams back together
  • normalize extended western characters to their ASCII representation

• custom

  • character filter
  • tokenizer
  • token filters

Chinese analyzer

• syntax

GET _analyze
{
  "analyzer": "icu_analyzer",
  "text":     "淮海中路"
}
GET _analyze
{
  "analyzer": "smartcn",
  "text":     "淮海中路"
}
GET _analyze
{
  "analyzer": "aliws",
  "text":     "淮海中路"
}
GET _analyze
{
  "analyzer": "ik_smart",
  "text":     "淮海中路"
}

• icu_analyzer

> 上海, 城区
> 澳门, 特别, 行政, 区
> 淮海, 中路
> 新, 锦, 江, 大, 酒店
> 南京, 长江, 大, 桥
> 巴, 音, 郭, 楞, 蒙古, 自治州

• smartcn

> 上海, 城区
> 澳门, 特别, 行政区
> 淮海, 中, 路
> 新, 锦江, 大酒店
> 南京, 长江, 大桥
> 巴音郭楞, 蒙古, 自治州

• aliws

> 淮海, 中路
> 新, 锦江, 大, 酒店
> 南京, 长江, 大桥

• ik_smart

> 淮海中路
> 新锦江, 大酒店
> 南京长江大桥