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The data type String can be defined as a sequence of characters or whole numbers (without a decimal place). When a platform/application demands a specific value in string format, the Cast: String mapper can be deployed.
Here is how to do it!
Step 1: Click on Add Data Transformer.
Step 2: Select Value Mapper.
Step 3: Select Key Accessor from the Accessor drop-down menu.
Step 4: Click on Add Keys and specify the key (or keys) that you wish to map from an entity data.
Step 5: Click on Add Mappers and select Cast: String.
Step 6: On clicking the Run Test button, you will see that the Cast: String mapper has mapped the specified key (or keys) to String values.