FX-SCH-A-000012

An Invoice shall have an Invoice issue date (BT-2).

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.

Message

[BR-03] An Invoice shall have an Invoice issue date (BT-2).

Context
/rsm:CrossIndustryInvoice
Test
(rsm:ExchangedDocument/ram:IssueDateTime/udt:DateTimeString[@format='102']!='')

Checked with Factur-X / ZUGFeRD MINIMUM