Abstract: Transaction processing is facilitated using an approach for automatically grouping transaction-based documents as a function of matching data in the documents. In one example embodiment of the present invention, data from selected attribute fields in transaction-based documents is parsed as the documents are received at a transaction processor. When data in selected attribute fields from two or more documents match, the transaction processor automatically groups the documents having matching data under a particular anchor identification code defined as a function of the match. Upon receipt of one or more other transaction-based documents, the transaction processor advances progress towards completion of the common transaction to which the documents apply. With this approach, predefined data (e.g., a purchase order number) need not necessarily be included with a particular transaction document in order to group the document with another document belonging to the same common transaction.