Message

Value MUST be part of code list 'Mime code (IANA Subset)'.

Context
/ubl:Waybill/cac:DocumentReference/cac:Attachment/cbc:EmbeddedDocumentBinaryObject
Test
not(@mimeCode) or (some $code in $clMimeCode satisfies $code = @mimeCode)
Code lists
Mime code (IANA Subset)
Usage
/ ubl:Waybill / cac:DocumentReference / cac:Attachment / cbc:EmbeddedDocumentBinaryObject / @mimeCode