BR-NL-22
The use of an invoice note subject code (/rsm:ExchangedDocument/ram:IncludedNote/ram:SubjectCode) is not recommended. If deemed necessary the code shall be agreed upon with the receiving party.
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.