How to go one level up in xml publisher reports

Question

Hi Experts,
I am working in XML Publisher reports; I am working Invoice report (standard report), below is my requirement.
Template sample:
<?for-each:G_INVOICE?>
<?trx_number?> <?trx_type?>
<?for-each:G_LINES?>
<?LINE_NUMBER?> <?COMMODITY_CODE?> <?QUANTITY?>
<?end for-each:G_LINES?>
<?end for-each:G_INVOICE?>
Requiremet: If 'trx_type' is INV i want to print commodity_code as COMMODITY_CODE else null.
I tried like this. It's didn't work out.
<?for-each:G_INVOICE?>
<?trx_number?> <?trx_type?>
<?for-each:G_LINES?>
<?LINE_NUMBER?> *<?xdofx:if TRX_TYPE='INV' then COMMODITY_CODE else CF_BID_ITEM end if?>* <?QUANTITY?>
<?end for-each:G_LINES?>
<?end for-each:G_INVOICE?>
Here, actually trx_type is in upper loop, it's not checking the TRX_TYPE='INV' condition, it's always going to else part. So I tried like below to go one level up.
*<?xdofx:if ../TRX_TYPE='INV' then COMMODITY_CODE else CF_BID_ITEM end if?>*
Still this is also not working. Is there any solutions, where we can use the upper level group field in line level to check the if condition.
Any suggetion is appreciated.
Kindly help.
Thanks in advance.

Answer 1

To go one level up from current,
you have to use ../ELEMENT_NAME Since you are trying to access a field in G_LINES context.
you have to open the xml and see, how may levels are there from G_LINES to G_INVOICE
if its 2 level up, then use ../../ELEMENT_NAME and likewise.