An input rule for a dynamic array determines the data type of the array elements. You can select one or more data types. The default input rule includes elements of all data types.
For example, you develop a dynamic mapping to process two different complex file sources. You expect that an array in one of the complex files is of string elements and an array in the other complex file is of integer elements. Then, you can select string and integer data types as input rules for the dynamic array port.
If you are not certain about the data type of the array elements, you can select all data types.
The following image shows the Dynamic Array Input Rule dialog box for a dynamic array port: