How Task Variables section for a Group Task is helpful?

TS 7.3.1, WFM-Java

When I click on a Group Task, LH Workflow properties pane showing a section for Task Variables. How could this is useful? Is it possible to call a external program from Group Task, by adding a TaskBeanId task variable?

I knew it is valid for an external task, as we can add TaskBeanId and in corresponding Java class we can read all task variables.

It may be a silly Q. Just want to be clear on the advantage of Task Variables section for a Group Task.

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Comments

Adam Stoller

The advantage could be for use by some other task (like an external task) that picks up additional information from your group task to do whatever it needs to do. That, and I believe task variables are part of the basic Task class properties and so they exist on all tasks regardless of whether or not there's a known-good-usage for them [at this time]