text: If you recall from exercise 2 there are two options when you create a new entity. One is to use a user 
  supplied name. That is the option that you should have selected at the beginning of the tutorial and that 
  should be active now. The other is to use an auto-generated name. This option creates a Universally 
  Unique Identifier (UUID) for the IRI of each entity. A UUID is an ID that is generated by an algorithm 
  and is guaranteed to be unique. There are also two ways to display an entity. One way is to use the last 
  part of the IRI that typically comes after a # sign as in the Pizza example above. The other is to use an 
  annotation property called a label. An annotation property is meant to provide meta-data about an entity. 
  Object and data property values can only be asserted on Individuals. However, since all entities have 
  meta-data annotation properties can be asserted on to any entity. There are some annotation properties 
  that are included by default with any Protégé ontology. You can see these by looking at the Annotation 
  properties tab. Note that just as with other properties you can also add your own annotation properties but 
  they should be used for meta-data not for regular data. You will see rdfs:label is one of the default 
  annotation properties. When you use UUIDs for your entity IRIs then by default Protégé will 
  automatically use the name you type in for a new entity in the rdfs:label annotation property. 
  Although you can also configure Protégé to use other properties if you wish, using the same dialog for 
  entity rendering that you used in exercise 2. 