SWRL rule on Protegé 4.3 used to initialize variables

Question

I'm working on understanding how to initialize a variable's value when using an ontology (written on OWL) and SWRL rules. To test this initialization problem I've created (on Protegé 4.3) a test class called Test, an individual of that class called Indiv and a property called Prop, with Test domain and int range. After that, I created a rule like this: Test(Indiv)->Prop(Indiv,5). If I understood a previous explanation correctly, now Indiv should have a 5 on its Prop property, but I can't see anything happening (Probably that's another question, how can I see on Protegé the change the rule does?)