ex:Root a ex:Process .

ex:Child1 a ex:Process ;
          ex:hasParent ex:Root .

ex:Child2 a ex:SubProcess ;
          ex:hasParent ex:Root .

ex:Grandchild1 a ex:SubProcess ;
               ex:hasParent ex:Child1 .

ex:Grandchild2 a ex:Process ;
               ex:hasParent ex:Child2 .