In list statement

Question

I have the following problem:
I have two different branches in my XML document. The two branches contains the same field (CATALOG_NBR). I want to make a statement so that if the field CATALOG_NBR of branch two not exist in branch 1 the field should be highlighted in red.
I have the following code:
<?choose:?><?when: CATALOG_NBR not in row_SAA_RPT_CRSU_VW?><?attribute@incontext:color;'red'?><?CATALOG_NBR?><?end when?><?end choose?>
has anyone got an idea what I'm doing wrong?

Answer 1

Thanks for the responses.
I ended up utilizing an ABAP routine:
IF lv_brand = '5004' OR
       lv_brand = '5089' OR
       lv_brand = '5097' OR
       lv_brand = '5119'
RESULT = 'S'.
ELSEIF ( lv_brand = '5001' OR
             lv_brand = '5010' OR
             lv_brand = '5052') OR
              ( lv_matnr = '6919' OR
             lv_matnr = '6939').
      RESULT = 'C'.
If you want to check if field is empty use IS INITIAL as statement
    ELSEIF lv_brand IS INITIAL.
      RESULT = 'N'.
    ELSE.
      RESULT = 'O'.
    ENDIF.