Slot ID in BIRT

BIRT User

<p>Hi,
I want to know what is Slot and how the Slot ID is created in BIRT report.
What is the difference between slot ID and element ID?
Is there a way to get the list of Slot IDs with element names in beforefactory() or onCreate() method?
And how to drop an element from container using Slot ID?

Thanks,
Ragu</p>