docs: def rst(value_rule):
      '''Given the data and type information, generate a list of strings for
      insertion into a RST document.
      '''
      lines = []
      if value_rule.has('type'):
          value_type = value_rule['type'].value
      else:
          value_type = 'string'
      if value_type=='ignore':
          pass
      else:
          lines.append('A *'+value_type+'* value is expected.')
          lines.append('')
      if value_type=="string":
          pass
      elif value_type=="label":
          pass
      elif value_type=="price":
          pass
      elif value_type=="qty":
          pass
      elif value_type=="percent":
          pass
      elif value_type=="check_list":
          pass
      elif value_type=="radio_select":
          pass
      elif value_type=="ignore":
          pass
      elif value_type=="unit":
          pass
      elif value_type=="angle":
          pass
      elif value_type=="file":
          pass
      elif value_type=="length":
          pass
      elif value_type=="distance":
          pass
      elif value_type=="duration":
          pass
      elif value_type=="mass":
          pass
      elif value_type=="temperature":
          pass
      elif value_type=="luminous_intensity":
          pass
      elif value_type=="current":
          pass
      elif value_type=="voltage":
          pass
      elif value_type=="frequency":
          pass
      elif value_type=="boolean":
          pass
      elif value_type=="integer":
          pass
      elif value_type=="float":
          pass
      elif value_type=="hexadecimal":
          pass
      return lines