Concepts to Know : Supported Files, Formats, and Text Types : Supported Text Types
 
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Supported Text Types
DataFlow predefines a number of text data types. These are available as constants and static factory methods on the TextTypes class. Types defined as constants always use the default schema settings for null indicator. Use the method of the same name to use a specific null indicator for the type. Some types may require additional parameters; this is indicated in the description of the type.
The set of available text types can be extended by implementing custom instances of the TextDataType interface.