Mapping a Single Element of Primitive Data Type
You can map a single element of a primitive data type to a single element of the same type in the output schema under Available data.
Drag the element from Available data and drop it on the destination element that you want to map in the Activity inputs pane.
In the following example, drag and drop FlowName (source) on message (destination) to map it. Alternatively, click message. Drag and drop FlowName in the text editor, or double-click FlowName.

Note: When user drags a non-string field to a string type of input in the data mapper, then the mapped variable is wrapped with
coerce to string
function implicitly.