Automatic creation of URL in identifier?


I wonder if there is any way to create or batch import URL for each item into the identifier property as URI? I would like to use two identifiers, one being a permanent URL for the item (for portal sites like DPLA) and the other being a local filename. I’m talking about the URL, which only gets generated after you create an item (with a resource ID). We could copy and paste URL going back and forth between the Site and the back-end, but that’s tedious. Is there any way to identify permalink URL before or while creating an item and automatically generate that in the identifier property as URI?