Using Resources in NavBarLink Url property

Question

Hi Everybody,

I'm creating a site definition for sharepoint 2010.

I have a problem with the Url Property of the NavBarLink.

<NavBar Name="$Resources:SOR,RootSiteDef_Nav_Report;" Url="$Resources:core,lists_Folder;/$Resources:SOR,RootSiteDef_Nav_Report;/" ID="1006">    
  <NavBarLink Name="$Resources:SOR,RootSiteDef_Nav_Report_ByOwnerAndSite;" Url="$Resources:core,lists_Folder;/$Resources:SOR,RootSiteDef_Nav_Report;/ByOwnerAndSite.aspx"/>
</NavBar>

The result is :
Report (with url Ok)
ByOwnerAndSite( with url : $Resources:core,lists_Folder;/$Resources:SOR,RootSiteDef_Nav_Report;/ByOwnerAndSite.aspx )

I don't understand why sharepoint resolve all my resource work except Url Property of the navbarlink.