Improve documentation

Change-Id: Iae8be8b9646e60747e4554418c3bfad63fe30990
Signed-off-by: Robert Varga <rovarga@cisco.com>
The set of local tables should always be a Set

Change-Id: Ia42de3cd6aeb4df01df601b3410f5ca92d5920df
Signed-off-by: Robert Varga <rovarga@cisco.com>
Merge changes Ia42de3cd,Iae8be8b9

* changes:
  The set of local tables should always be a Set
  Improve documentation