OptionalfileThe name of the XML file in which the error occurred.
The severity of the diagnostic (libxml2 xmlErrorLevel): 1 = warning, 2 = error, 3 = fatal.
The line number in the xml file where the error occurred.
The error message during processing.
OptionalxpathThe XPath to the node associated with the error, when available.
The column number in the XML file where the error occurred.