You can create transformation ports in Excel and then copy them to the Developer tool.
Create a mapping in the Developer tool with the required transformations.
Define metadata for a transformation in Excel.
Copy the metadata from Excel.
To move the metadata to the transformation in the Developer tool, right-click within Ports and click
Paste (Replace).
The following image shows a sample Excel table and the resulting transformation after you copy the metadata to the Developer tool:
You must confirm that the values in each cell are valid before copying the values to a transformation. For example, a string type cannot have a scale value other than "0." Precision values cannot be words and type values cannot be numbers. If the metadata is incorrect, an error message appears.