HAP1650-6d

TotalGrossAmountBeforeTaxes is positive, so TotalTaxesWithheld may not be negative (…).

error: the document is invalid

What the rule checks

As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.

Context
/*:Facturae/*:Invoices/*:Invoice
Test
not($before gt 0) or not($totals/*:TotalTaxesWithheld) or $withheld ge 0

Checked with Facturae 3.2.2