EDI Sales Order Confirmation and Invoice & Order Changes

I need to be able to send Sales Order Confirmations and Invoices via EDI, but information related to that Sales Order (price, for example) can change any time between Sales Order Creation until AFTER invoicing. If I have already sent an invoice via EDI and I must go back to the Sales Order to update my price information, how is Invoicing via EDI affected? Will the system send a second invoice with the updated information?