Human tasks typically present some data related to the task that needs to be performed to the actor that is executing the task. Human tasks usually also request the actor to provide some result data related to the execution of the task. Task forms are typically used to present this data to the actor and request results.

You must specify the data that is used by the Task when you define the User Task in our Process. In order to do that, you need to define which data must be copied from the process context to the task context. Notice that the data is copied, so it can be modified inside the Task context but it will not affect the process variables unless we decide to copy back the value from the task to the process context.

Most of the times Forms are used to display data to the end user. This allows them to generate or create new data to propagate to the process context to be used by future activities. In order to decide how the information flow from the process to a particular task and from the task to the process, you need to define which pieces of information must be automatically copied by the process engine.