DT-CIUS-PT-020_10.3
The BT-22 when prefixed with '#WITHHOLDINGTAXAMOUNT@WITHHOLDINGTAX-000#' must be unique.
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
//ubl:Invoice/cbc:Note | //cn:CreditNote/cbc:Note
Test
starts-with(normalize-space(.),$wht20_10) and $cnt20_10 > 1
Checked with Portugal CIUS-PT Invoice (UBL), Portugal CIUS-PT Credit Note (UBL)