Mapping only special line

HI all,

I have the IDOC ORDER02 and want only to map the entry within the partners that has a given PARVW ('AG' for example).

So my question is:

If there are more than one partners ('WE', 'AG' and 'LF' for example) and I only want to map the 'AG' to my result, can I do this with the graphical tool, or do I have to use a XSLT or BP?

Thanx

Olli