Message

Value MUST be part of code list 'ProductTraceIDschemeID'.

Context
/ubl:DespatchAdvice/cac:DespatchLine/cac:Item/cac:ItemInstance/cbc:ProductTraceID
Test
not(@schemeID) or (some $code in $clProductTraceIDschemeIDCode satisfies $code = @schemeID)
Code lists
ProductTraceIDschemeID
Usage
/ ubl:DespatchAdvice / cac:DespatchLine / cac:Item / cac:ItemInstance / cbc:ProductTraceID / @schemeID