code - the error's code
column - the column where the error occurred. Please note that this property isn't entirely implemented in libxml and therefore 0 is often returned.
file - the filename, or empty if the XML was loaded from a string
level - the severity of the error (one of the following constants: LIBXML_ERR_WARNING, LIBXML_ERR_ERROR or LIBXML_ERR_FATAL)
line - the line where the error occurred
message - the error message