code: def _convert_nominal_form( analysis ):
      ''' Converts nominal categories of the input analysis. 
          Performs one-to-one conversions only. '''
      assert FORM in analysis, '(!) The input analysis does not contain "'+FORM+'" key.'
      for idx, pattern_items in enumerate(_noun_conversion_rules):
          pattern_str, replacement = pattern_items
          if pattern_str in analysis[FORM]:
             analysis[FORM] = analysis[FORM].replace( pattern_str, replacement )
      return analysif _convert_nominal_form( analysis ):
      ''' Converts nominal categories of the input analysis. 
          Performs one-to-one conversions only. '''
      assert FORM in analysis, '(!) The input analysis does not contain "'+FORM+'" key.'
      for idx, pattern_items in enumerate(_noun_conversion_rules):
          pattern_str, replacement = pattern_items
          if pattern_str in analysis[FORM]:
             analysis[FORM] = analysis[FORM].replace( pattern_str, replacement )
      return analysis
docs: Converts nominal categories of the input analysis. 
          Performs one-to-one conversions only.