VGBEL is a standard field within SAP Table vbrp that stores Reference document information. SAP ABAP Table Field VBRP-VGBEL (Document number of the reference document) - SAP Datasheet - The Best Online SAP Object Repository. Hi, Are VBAK-VBELN and VBRP-VGBEL the same thing? They seem to be, since VBAK is sales document and VBRP is billing document. VBRP (Billing Document: Item Data) is a standard table in SAP R\3 ERP. Search for invoices with delivery number (preceding document, field VBRP- VGBEL):. I know that the fields J_1BNFDOC-DOCNUM and VBRP-VGBEL have the same information, however, the query does not allow this relationship.