problem with attributes in target

Hi,

I have problem with this RDF file:


<RDF:RDF
          xmlns:ROOMS="http://www.dbroom.com/rdf#"
          xmlns:NC="http://home.netscape.com/NC-rdf#"
          xmlns:RDF="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
   <RDF:Description RDF:about="http://www.dbroom.com/locations/2"
                    ROOMS:location="Test"
                    ROOMS:desc="Test">
     <ROOMS:Price NC:parseType="Integer">4</ROOMS:Price>
     <ROOMS:NumRooms NC:parseType="Integer">12</ROOMS:NumRooms>
   </RDF:Description>


How I can add new node with similar attributes like this:
<ROOMS:Price NC:parseType="Integer">4</ROOMS:Price>

This is no problem add this attribute:

<RDF:Description RDF:about="http://www.dbroom.com/locations/2"
                    ROOMS:location="Test"
                    ROOMS:desc="Test"
		   ROOMS:Price="4"/>

But what is with this element: NC:parseType="Integer"
How I can set this because I need this for correct sort numbers in tree.

Regards Pawel