Data Fields
Data Field, which is also known as Process Variable, helps Process Pipelines to access and store information from external applications. Often the process flow is based on the value of this information. In other cases, this information is the result of running the tasks in the Pipeline
System Data Fields
Some data are tracked internally by the System using a predefined set of Data Fields such as Status of Process. You can access these activity instance attributes in the same way you access regular data objects, but you cannot assign new values to them.
Adding a Data Field