CII-SR-003
BusinessProcessSpecifiedDocumentContextParameter should exist maximum once
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
/rsm:CrossIndustryInvoice/rsm:ExchangedDocumentContext
Test
(count(ram:BusinessProcessSpecifiedDocumentContextParameter) <= 1)
Checked with EN 16931 Invoice (CII)