BR-KSA-03
The invoice must contain a unique identifier ("UUID") (KSA-1) given by the unit that issued the document (unique message identifier for interchange process). This value must contain only letters, digits, and dashes.
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.
/ubl:Invoice | /cn:CreditNote
exists(cbc:UUID) and (cbc:UUID) != '' and matches(cbc:UUID, '^[\w.-]+')
Checked with Saudi Arabia ZATCA Tax Invoice (UBL), Saudi Arabia ZATCA Simplified Tax Invoice (UBL)