W-INV184
Use a Valid UNSPSC 19.0501 code
warning: reported, still valid
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
doc:Invoice/cac:InvoiceLine/cac:Item/cac:CommodityClassification
Test
cbc:ItemClassificationCode and not(cbc:ItemClassificationCode/@listID='UNSPSC')
Checked with Denmark OIOUBL 2.1 Invoice