This also allows you to check your models against this RDFS rule set. While it is certainly useful to know a little bit about prolog, it is not necessary, because you can choose some interesting predefined queries from the pre-selection list. You have to use this term, if you want to query using literals. This gives the basic facts of the knowledge base. Gives the resources.
P is range constrained.
This is because Prolog tries to infer the answer in all possible ways. In addition, we have defined a number of convinience predicates . Most of them can be choosen from the pre-selection menu on the query form. Simply give it a try. What you may want to do is to introduce semantics on top of the basic facts and rules that allow to specify more precisely what you intend with your predicates .