1) What is Tableau’s Document API? With the release of Tableau 10, Tableau released a python utility called the Tableau Document API (or TDA for short). TDA allows users to easily programmatically modify tableau workbooks. Modifying tableau workbooks without using Tableau Desktop was possible before as tableau files .twb are actually just xml files. However, manually editing the xml of .twb files could easily result in a corrupted workbook. Fortunately with the release of this tool it is now much less risky to modify workbooks without using Tableau Desktop.