Mapping Field Analyzer

• Character filtering
• E.g., remove html encoding, convert & to and
• Tokenizer
• Split strings with a pattern

• Token filter

• Lowercasing, stemming, synonyms, stopwords

• Analyzer options

• standard: split on words boundaries, remove punctuation, lowercase everything
• simple: split on anything that isn't a letter, lowercase everything
• whitespace: split on whitespaces
• english: account for language-specific stop-words and stemming

{
  "mappings": {
    "properties": {
      "description": {
        "type": "text",
        "analyzer": "english" // field analyzer
      }
    }
  }
}