Help:What are sub- and super properties?


 * Question
 * question:=What are sub- and super properties?




 * Answer
 * description:=e.g. has relative is a superproperty of has parent, while has father is a subproperty of has parent.

Properties can be sub-classed. Consider the following relations with their domains and ranges:
 *  is father of 
 *  is parent of 

It is very reasonable that is father of is a sub-property of is parent of. So, while annotating a text, you can use the is father of property. In a query, or in the reasoning system, another user could ask for parents and would automatically get all fathers.

Steps for setting up an example:  Create the article Property:is parent of. Write some descriptive text and save it. Create the article Property:is father of. Write some descriptive text and add the annotation: subproperty of::Property:is parent of  Save the article.  Reopen the article Property:is parent of. Now it should show its sub-relation is father of. 

Sub-properties are also considered in the Special:Ontology Browser.