XRechnung 2.3.0 · UBL
Rules: XRechnung Schematron rules by Koordinierungsstelle für IT-Standards (KoSIT) · Apache-2.0
[BR-IP-06]-In a Document level allowance (BG-20) where the Document level allowance VAT category code (BT-95) is "IPSI" the Document level allowance VAT rate (BT-96) shall be 0 (zero) or greater than zero.
(cbc:Percent) >= 0