The Delete Special command deletes not only the selected entities but their parent entities as well. As an example, if you select a block, then Delete
Special, the block, its domains and its connectors will all be deleted. For cases in which a database (with an associated grid) is selected, a dialog will
appear stating that the associated grid entities are about to become unconstrained. When deleting a database model or quilt entity, Delete Special will also
delete quilt parent entities automatically.
Tip: Delete Special is a great way to delete not only the definition of a domain but all of its constituent connectors as well.