[oXygen-user] Finding DTD's in jar files

Hi guys, What if I have an xml file declared as this: <!DOCTYPE Requests PUBLIC "-//iPlanet//Sun ONE Identity Server 6.1 Admin CLI DTD//EN" "jar://com/iplanet/am/admin/cli/amAdmin.dtd"

I know which jar file the dtd is stored in. How do I configure Oxygen to find it there. Thanks a lot! Serge