rdfs:subPropertyOf of rdf:type and rdfs:subClassOf possible?

Hi,
 
I need to define a subProperties of rdf:type and also of rdfs:subClassOf.
When I look at the domain and range of rdfs:subPropertyOf I see that both
require an rdf:Property. And rdf:type and rdfs:subClassOf are Properties.
 
So, is the following allowed?
 
<owl:ObjectProperty rdf:ID="upperBoundOf">
  <rdfs:subPropertyOf
rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/>
</owl:ObjectProperty>
 
<owl:ObjectProperty rdf:ID="subClassByRoleOf">
  <rdfs:subPropertyOf
rdf:resource="http://www.w3.org/2000/01/rdf-schema#subClassOf"/>
</owl:ObjectProperty>
 
Regards,
Hans
 
_______________________ 
Hans Teijgeler
ISO 15926 specialist
 <http://www.InfowebML.ws> www.InfowebML.ws
 <mailto:hans.teijgeler@quicknet.nl> hans.teijgeler@quicknet.nl
phone +31-72-509 2005