code: def new(cls, rId, reltype, target, target_mode=RTM.INTERNAL):
          
          xml = '<Relationship xmlns="%s"/>' % nsmap['pr']
          relationship = parse_xml(xml)
          relationship.rId = rId
          relationship.reltype = reltype
          relationship.target_ref = target
          relationship.targetMode = target_mode
          return relationship
docs: Return a new ``<Relationship>`` element.