This screencast will quickly introduce you to ontologies, and will explain you what are their rules in the Open Semantic Framework (OSF).
You will see how you can manage ontologies in OSF using the OSF for Drupal web interface. You will be able to import, create, update, delete and export ontologies. You will see how you can search within imported ontologies, how you can manage their permissions.
Finally you will see how you can manage the ontologies themselves: how you can create, update and delete classes, properties and named individuals using the Web user interface.