template builder problem ?

Hi,

I'm trying to use the templating system but couldn't manage to do it 
simply follow reversly a property. Is this possible :

I just want to draw the classes/subclasses tree of RDF elements 
representing classes such as in object programming concepts.

So I have these triples for example in my RDF :

Class --> subClassOf --> Resource
Datatype --> subClassOf --> Class
Property --> subClassOf --> Resource

should draw :

[+] Resource
  |- [+] Class
  |   \- Datatype
  \- Property

This seems simple but the fact we must follow a property the other way 
round to ask for childs do not seems to be supported by the builder.

A solution ?

Thx
Valentin