text: Load the downloaded file into Protégé. Go to the Class hierarchy tab and navigate to the new 
  ChicagoPizza class under NamedPizza. Add the axiom (refer back to chapter 4 if you need to remember 
  how to add axioms to classes) hasBase some DeepPanBase. Save the file. Now go back to Web Protégé 
  and your version of the Pizza ontology there. Note that in the upper right corner of the window there are 
  links (drop down menus) such as Display and Project. Select Project and from the drop down menu select 
  Apply External Edits. This will give you a small dialog titled Upload ontologies with a little button to 
  Choose File. Click on Choose File. That will give you the standard OS dialog for selecting a file. 
  Navigate to the file you saved from Protégé and select that then choose OK. That should result in a new 
  pop-up window titled Merge ontologies where you will see the changes (in this case only the addition of 
  the ChicagoPizza axiom) and a text box where you can describe the changes. Add an appropriate 
  Commit message or just take the default and select OK. You should get a message that says the changes 
  were successfully applied. 
  
  If you navigate back to ChicagoPizza you should see that it now has that axiom. You can also navigate 
  back to NamedPizza. In the right most column, you should see the comments about needing to add 
  ChicagoPizza as a subclass. Now that this has been done you can click on the Resolve link in the upper 
  right corner of the comment thread and the comments will be removed from NamedPizza. 