F-LIB382

When 'TaxCategory\ID' = 'StandardRated', 'TaxCategory\Percent' must be present and greater than 0.00. Found value: '…'.

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.

Test
cbc:ID = 'StandardRated' and (string(cbc:Percent) = '' or xs:decimal(cbc:Percent) = 0.00)

Checked with Denmark OIOUBL 2.1 Invoice