This image shows the Data Association editor. The Data Objects section with data objects is displayed on the right. The following data mapping is displayed (from top to bottom):

The association icon for the first two mapping is green. The data association for the third mapping is red and there is an error message “Cannot assign ‘string’ to ‘Array of (string)’. There is a drop-down menu under the red association icon with the Append action.

The Apply and Cancel buttons are at the top right corner of the editor.