DataMember
Take a moment to think about a typical organization. You have an employee. That employee has a supervisor who is also an employee who has a supervisor (who is also an employee) and so on and so on. (This is a classic parent-child hierarchy.)
If these employees are in a sales organization, sales quota may have been assigned. Those employees that are supervisors are responsible for the sales quotas of the employees below them but may also have sales quotas of their own.
Please also read part 2.
Tags: mdx, parent-child