# filename: ex481.ru PREFIX ab: PREFIX v: DELETE { ?s ab:firstName ?firstName ; ab:lastName ?lastName ; ab:email ?email . ?s ab:homeTel ?homeTel . } INSERT { ?s v:given-name ?firstName ; v:family-name ?lastName ; v:email ?email ; v:homeTel ?homeTel . } WHERE { ?s ab:firstName ?firstName ; ab:lastName ?lastName ; ab:email ?email . OPTIONAL { ?s ab:homeTel ?homeTel . } }