PO fields in Payables Invoice Open Interface tables .

In 12.1.3 I see the Payable Invoice Open Interface tables have fields for PO number, PO Line number, etc. My client external system is providing this info in the feed, when the Payable Invoice Import job is run does EBS automatically match the invoice to the PO?  The PO are already in system through a separate feed.

UPDATE: I guess I answer my own question, I see in the following Payables Open Interface Table Description document that it does say by filling in the PO field means it is matched.  https://docs.oracle.com/cd/A60725_05/html/comnls/us/ap/openin02.htm