CII-SR-009

GuidelineSpecifiedDocumentContextParameter must exist exactly once

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.

Context
/rsm:CrossIndustryInvoice/rsm:ExchangedDocumentContext
Test
count(ram:GuidelineSpecifiedDocumentContextParameter) = 1

Checked with EN 16931 Invoice (CII)