Describe arbac02 checks
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For example, the following top-down role hierarchy:
+```
CTO
|
| |
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DA QA
|
A
-
+```
+
Where a role called 'CTO' is the highest ascendant, and 'A' is the lowest descendant. In a top-down role hierarchy, privilege increases as we descend in the tree. So a person with role 'A' inherits all that are above.
In describing a range of roles, begin range is the lowest descendant in the chain, and end range the highest. Furthermore a bracket, '[', ']', indicates inclusiveness, whereas parenthesis indicates exclusiveness for a particular endpoint.
