How to Group and Sum rtf elements

Question

Dear Friends,
I am having limited knowledge of XML so looking for your help
I am trying to create external template for Bill Presentment Architecture which is in .rtf. Template is having 3 section Invoice header, Lines and Tax summary.
Invoice Header and line section is ok, but facing some issues with Tax section.
LINE SECTION
LINE_ID     ITEM     RATE     QTY     BASE_AMT     TAX_RATE     TAX_AMT     TOTAL_AMT
1     P0001     20     10     200     21%     42     242
3     P0003     40     30     1200     21%     252     1452
4     P0004     20     100     2000     10%     420     2200
5     P0005     50     10     500     10%     105     550
2     P0002     50     20     1000     6%     210     1060
EXPECTED RESULT IN TAX SUMMARY SECTION WHICH I AM LOOKING FOR
TAX RATE           BASE_AMT          TAX_AMT          TOTAL_AMT
21%          1400          294          1694
10%          2500          525          2750
6%          1000          210          1060
Looking for your help, much appriciated.
Regards,
Jay
Edited by: 992820 on Mar 9, 2013 5:20 AM

Answer 1

>
Tax Code Taxable amount
VAT 6% 1200
VAT 6% 1400
VAT 7% 1000
VAT 7% 2000
I used you code
<?for-each-group:LINE;./tax_code?> G tag
and getting following result
VAT 6% 1200
VAT 7% 1000
>
because you have loop by tax_code and no loop and no aggregation function (e.g. sum) for amount, so amount will be from first row
try add sum function for amount
also http://docs.oracle.com/cd/E18727_01/doc.121/e13532/T429876T431325.htm#I_bx2Dcontent
Summary Lines: Check this box if you want to display summarized transaction lines. Grouped lines are presented in the Lines and Tax area of the primary bill page.so it's may be not template problem but some settings?