HTML Estimator.html
  HTML Model.html
  HTML Pipeline.html
  HTML PipelineModel.html
  HTML PipelineStage.html
  HTML PredictionModel.html
  HTML Predictor.html
  HTML Transformer.html
  HTML UnaryTransformer.html
   DIR attribute
   DIR classification
   DIR evaluation
   DIR feature
  HTML package.html
   DIR param
   DIR recommendation
   DIR regression
   DIR tree
   DIR tuning