| RawDocument | RawDocument simply encapsulates a php variable |
| TokensDocument | Represents a bag of words (tokens) document. |
| TrainingDocument | A TrainingDocument is a document that "decorates" any other document to add the real class of the document. |
| TrainingSet | A collection of TrainingDocument objects. |
| WordDocument | A Document that represents a single word but with a context of a larger document. |
Interfaces
| DocumentInterface | A Document is a representation of a Document to be classified. |