Add Belgian structured communication (OGM/VCS) invoice reference type

account_invoice_structured_ref_be/models/account_journal.py

@@ -0,0 +1,11 @@
+# -*- coding: utf-8 -*-
+from odoo import fields, models
+
+
+class AccountJournal(models.Model):
+    _inherit = 'account.journal'
+
+    invoice_reference_type = fields.Selection(
+        selection_add=[('be_structured', 'Based on Invoice Number (BE Structured)')],
+        ondelete={'be_structured': 'set default'},
+    )