elasticSearch 內置功能列表

從名字能夠看出來，`default`是索引和搜索時用的默認的analyzer，`default_index`是索引時用的默認的analyzer， `default_search`是查詢時用的默認analyzer。

下面是在elasticsearch.yml中配置默認analyzer的例子
index:

  analysis:

    analyzer:

        default_index:

            tokenizer: standard

            filter: [standard, lowercase, my_synonym, my_snow]

        default_search:

            tokenizer: standard

            filter: [standard, lowercase, stop]

ES內置的一些analyzer。
| analyzer              | logical name  | description                               |

| ----------------------|:-------------:| :-----------------------------------------|

| standard analyzer     | standard      | standard tokenizer, standard filter, lower case filter, stop filter |

| simple analyzer       | simple        | lower case tokenizer                      |

| stop analyzer         | stop          | lower case tokenizer, stop filter         |

| keyword analyzer      | keyword       | 不分詞，內容總體做爲一個token(not_analyzed) |

| pattern analyzer      | whitespace    | 正則表達式分詞，默認匹配\W+                 |

| language analyzers    | [lang](http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/analysis-lang-analyzer.html)  | 各類語言 |

| snowball analyzer     | snowball      | standard tokenizer, standard filter, lower case filter, stop filter, snowball filter |

| custom analyzer       | custom        | 一個Tokenizer, 零個或多個Token Filter, 零個或多個Char Filter |

tokenizer：ES內置的tokenizer列表。
| tokenizer             | logical name  | description                           |

| ----------------------|:-------------:| :-------------------------------------|

| standard tokenizer    | standard      |                                       |

| edge ngram tokenizer  | edgeNGram     |                                       |

| keyword tokenizer     | keyword       | 不分詞                                 |

| letter analyzer       | letter        | 按單詞分                               |

| lowercase analyzer    | lowercase     | letter tokenizer, lower case filter   |

| ngram analyzers       | nGram         |                                       |

| whitespace analyzer   | whitespace    | 以空格爲分隔符拆分                      |

| pattern analyzer      | pattern       | 定義分隔符的正則表達式                  |

| uax email url analyzer| uax_url_email | 不拆分url和email                       |

| path hierarchy analyzer| path_hierarchy| 處理相似`/path/to/somthing`樣式的字符串|

token filter：ES內置的token filter列表。
| token filter          | logical name  | description                           |

| ----------------------|:-------------:| :-------------------------------------|

| standard filter       | standard      |                                       |

| ascii folding filter  | asciifolding  |                                       |

| length filter         | length        | 去掉太長或者過短的                      |

| lowercase filter      | lowercase     | 轉成小寫                               |

| ngram filter          | nGram         |                                       |

| edge ngram filter     | edgeNGram     |                                       |

| porter stem filter    | porterStem    | 波特詞幹算法                            |

| shingle filter        | shingle       | 定義分隔符的正則表達式                  |

| stop filter           | stop          | 移除 stop words                        |

| word delimiter filter | word_delimiter| 將一個單詞再拆成子分詞                   |

| stemmer token filter  | stemmer       |                                        |

| stemmer override filter| stemmer_override|                                     |

| keyword marker filter | keyword_marker|                                        |

| keyword repeat filter | keyword_repeat|                                        |

| kstem filter          | kstem         |                                        |

| snowball filter       | snowball      |                                        |

| phonetic filter       | phonetic      | [插件](https://github.com/elasticsearch/elasticsearch-analysis-phonetic) |

| synonym filter        | synonyms      | 處理同義詞                              |

| compound word filter  | dictionary_decompounder, hyphenation_decompounder | 分解複合詞  |

| reverse filter        | reverse       | 反轉字符串                              |

| elision filter        | elision       | 去掉縮略語                              |

| truncate filter       | truncate      | 截斷字符串                              |

| unique filter         | unique        |                                        |

| pattern capture filter| pattern_capture|                                       |

| pattern replace filte | pattern_replace| 用正則表達式替換                        |

| trim filter           | trim          | 去掉空格                                |

| limit token count filter| limit       | 限制token數量                           |

| hunspell filter       | hunspell      | 拼寫檢查                                |

| common grams filter   | common_grams  |                                        |

| normalization filter  | arabic_normalization, persian_normalization |          |

character filter：ES內置的character filter列表
| character filter          | logical name  | description               |

| --------------------------|:-------------:| :-------------------------|

| mapping char filter       | mapping       | 根據配置的映射關係替換字符   |

| html strip char filter    | html_strip    | 去掉HTML元素               |

| pattern replace char filter| pattern_replace| 用正則表達式處理字符串    |