Classes have a hierarchical relationship to each other. The semantic property 'Sub-ClassOf' describes this relationship. As values, another class can be set to describe a relationship. This means that every instance of a subclass is always an instance of the superclass as well. For example, it could be specified that the class 'battery' is a subclass of the class 'energy storage'. This states that every battery is a form of energy storage. If the users do not specify a superclass for a class, then it is automatically a subclass of the generic class 'Thing'. The SubClassOf property is exported as an rdfs:subClassOf statement. A similar hierarchical ordering exists for properties. As you start typing in the name, you are presented with a list of already defined classes.
|The following Help topics are available:|