Oracle Receivables is the primary data source in Bill Presentment Architecture (BPA) and has two seeded views, Invoice Header View and Billing Lines View. The seeded content items can be viewed by navigating to: Configuration > Data Sources. Query for Primary data source level and choose Oracle Receivables. Select one of the two seeded data source views to view the content items seeded under them.
For detailed description of these content items in the AR tables, refer to the Oracle eBusiness Suite Electronic Technical Reference Manual (eTRM) on OracleMetaLink.