docs: def set_dn(self,dn):
      """
      Use the domain column in the process table to store the DN
  
      dn = dn to be added
      """
      try:
        domain_col = self.table['process']['orderedcol'].index('domain')
        for row_idx in range(len(self.table['process']['stream'])):
          row_list = list(self.table['process']['stream'][row_idx])
          row_list[domain_col] = dn
          self.table['process']['stream'][row_idx] = tuple(row_list)
      except ValueError:
        self.table['process']['column']['domain'] = 'lstring'
        self.table['process']['orderedcol'].append('domain')
        for row_idx in range(len(self.table['process']['stream'])):
          row_list = list(self.table['process']['stream'][row_idx])
          row_list.append(dn)
          self.table['process']['stream'][row_idx] = tuple(row_list)