Introduction to Defining Data Transformations Introduction to Defining Data Transformations A data transformation creates a new message that is a transformation of another message. When you transform a message, your data transformation sends a new message body that is a transformation of the original. Some of the transformations that occur during this process can include: Copying values from properties on the source to properties on the target. Performing calculations using the values of properties on the source. Copying the results of calculations to properties on the target. Assigning literal values to properties on the target. Ignoring any properties on the source that are not relevant to the target.