Namespace List
Here is a list of all documented namespaces with brief descriptions:

Mapper | Mapper namespace contains all the definitions in the Mapper module
AbstractMapperIterator | Abstract base class for hash iterator mappping classes based on a mapper object and an iterator input source
AnythingDataType | Describes a data type that accepts any value; stores "string.max_size_chars" as a type attribute for external enforcement
Mapper | This class is a base class for mapping data; see Mapper Examples for usage examples
MapperIterator | Hash iterator based on a mapper object and an iterator input source
MapperOptionInfo | Describes type options
MapperOutputRecordIterator | Output record iterator for Mapper objects with an input data provider
SomethingDataType | Describes a data type that accepts any value except NOTHING; stores "string.max_size_chars" as a type attribute for external enforcement