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Use the Tableau Data Extract API to connect to data that is not currently a supported Tableau data source. With the Tableau Data Extract API, you create a program that accesses and processes your data. You then use that program to create a Tableau Data Extract (TDE) file.

When you include external files, a copy of the data source is published. External file data sources include Excel, Access, Text, Data Extract, and image files. If you don’t include these files, others may not be able to see the worksheets online.

Tableau 8 provides an application programming interface (API) to enable developers to directly create a Tableau Data Extract (TDE) file. The API works with C/C++, Java, and Python and can be used from Windows.