Thank you for the reply!! Sorry for not posting more information. Here is what I am trying to do.
The repeating section has attributes of a part number that should auto populate after the part number is entered. The XPath above is for the field that should populate the PART_DESCRIPTION. So basically once the PART_NUMBER is entered it populates the PART_DESCRIPTION which is in the PRODUCTS table. The filter on the field is verifing the value entered in the DonaldsonPartNumber field equals PART_NUMBER in the PRODUCTS table and returns the PART_DESCRIPTION for that part.
When I insert a new section all the attributes carry from that part number no matter what part number I enter in the other sections...