AnalysisScheme 
    class AnalysisScheme
Configuration information for an analysis scheme. Each analysis scheme has a unique name and specifies the language of the text to be processed. The following options can be configured for an analysis scheme: Synonyms, Stopwords, StemmingDictionary, JapaneseTokenizationDictionary and AlgorithmicStemming.
Types
Properties
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                  Synonyms, stopwords, and stemming options for an analysis scheme. Includes tokenization dictionary for Japanese.
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                  An IETF RFC 4646 language code or mul for multiple languages.
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                  Names must begin with a letter and can contain the following characters: a-z (lowercase), 0-9, and _ (underscore).