| Class | Description | 
|---|---|
| Column | 
 Holds the metadata and statistics for each field in a dataset. 
 | 
| Dataset | 
 The base class for caching records produced by a  
Pipeline or DataMappingPipeline. | 
| Dataset.ColumnsDataReader | |
| DatasetIterator | 
 Obtains records from those cached in a  
Dataset. | 
| DatasetReader | 
 Obtains records from those cached in a  
Dataset. | 
| DatasetSpliterator | 
 Traverses records from those cached in a  
Dataset. | 
| LocalFileDataset | 
 Caches the dataset's records on disk as binary data. 
 | 
| MemoryDataset | 
 Caches the dataset's records in RAM. 
 | 
| MvStoreDataset | 
 Caches the dataset's records on disk using MVStore. 
 | 
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