Adding an item ID to EPP record

Summary:

I am hoping to get more information on how an item number (for item built in Product Information Management) is automatically applied to an external purchase price line.

The documentation (https://docs.oracle.com/en/cloud/saas/procurement/23d/oaprc/import-external-purchase-prices.html#s20080527) says that "When a manufacturer part number is associated as a trading partner item to an item number, the item is automatically derived and shown in the external purchase price lines."

My questions are:

• does the part number need to be an exact match? Or will it ignore special characters? For example, our trading partner number has only numbers, but the EPP line has a "-". Will this be matched?