| class  | ANDQueryOp | This combines multiple operators into a single op, where must all occur
 in a document. | 
| class  | FuzzyTermOp | A synonym class that uses leveinsten distance to match terms. | 
| class  | PhraseOp | This combines multiple operators into a single op, where they occur adjacently. | 
| class  | PrefixTermOp | A synonym class that matches terms with a common prefix in the lexicon. | 
| class  | SynonymOp | This combines multiple operators into a single op. | 
| class  | UnorderedWindowOp | This combines multiple operators into a single op, where they occur within a specified
 window of tokens. |