code: def p_prj_home_art_2(self, p):
          
          try:
              self.builder.set_file_atrificat_of_project(self.document,
                  'home', utils.UnKnown())
          except OrderError:
              self.order_error('ArtifactOfProjectName', 'FileName', p.lineno(1))
docs: prj_home_art : ART_PRJ_HOME UN_KNOWN