The Invoice Repository uses a SQL repository to store customer invoices; see the SQL repository chapters in the Repository Guide for more information. Its configuration file is located at <ATG11dir>/DCS/src/config/atg/commerce/invoice/invoicerepository.xml. This file defines the item descriptors for the invoice classes, which in turn define important properties for the given class. The repository itself appears at /atg/commerce/invoice/InvoiceRepository in Nucleus.