[oXygen-user] Generating IDs on DITA maps

Is there a way to get Oxygen to generate an ID for a new DITA map? It already does this for topics. Also, is there a way to batch generate IDs for a whole group of XML files, like those in a DITA map? I see info on things like "Managing ID/IDREFS" in the help, but that seems to apply to something else. Thanks, Mark