added license information

Change-Id: I35367f661747043ede078670971b9039259ce05c
updated license information

Change-Id: I20f9dbf018ec122650877129abf80e1f258ea949
Use owl:Class as type for sub-classes of OWL classes.

Change-Id: I3dce98266c5190e8ef2b7b27610e0ed9bc975080