| Reference to the problem causing warning or failure. This is a reference to an element in a message where a reported warning or error has occurred. In this situation, a "message" is defined as an XML instance document and there is an assumption that the response MUST contain an "echoing" of the initial request and, at a minimum, the data elements and parent aggregate to which the ProblemRef references.The format follows an Xpath notation in the form of id("Parent_ID")/ChildElement[Index] where Parent_ID is the complex element (aggregate) under which a data element 'ChildElement' name exists.The Parent element may exist anywhere in the data model.For more information, please refer to the specification section on "Error Processing" in Section 6. |