Don't include "?" in rel="first" if nothing after
Don't include "?" in rel="first" if nothing after

zebulon2/dataserver,zebulon2/dataserver,grumbelbart/zotero_dataserver_sualk,grumbelbart/zotero_dataserver_sualk,zebulon2/dataserver,grumbelbart/zotero_dataserver_sualk,zebulon2/dataserver,grumbelbart/zotero_dataserver_sualk