text: 5 The Entities tab is a big tab that has tabs like Classes, Object properties, Data properties, etc. as sub-tabs. Each of 
  these sub-tabs is also a major tab (a tab accessible from the Window>Tabs option) that can be created on its own. 
  Since I took screen snapshots at various times I wasn’t always completely consistent. Sometimes I used Classes as a 
  sub-tab of the Entities tab and sometimes as a major tab on its own. Also, at different points in time I had other 
  tabs open depending on what other work I was doing. Thus, your UI won’t look identical to the figures. There may 
  be additional tabs in the figure that aren’t in your UI or vice versa. 
  
  14 