By nesting jobs, you implicitly create a relationship among the jobs. Look at the following screenshot:
Job that executes jobs
Here, you can see how a Job and even a transformation may have parents and grandparents. The main Job is called root job. This hierarchy is used to understand the scope of variables, that is, the places where the variables are visible. In Chapter 12, Creating Portable and Reusable Transformations, you learned about two scopes: Java Virtual Machine and Valid in the current Job. Now that you know about nested jobs, you are ready to understand all the scopes, which are summarized ...
