xmlua.HTMLSAXParser.error.level and xmlua.XMLSAXParser.error.level value list

xmlua.HTMLSAXParser.error.level and xmlua.XMLSAXParser.error.level have values as below.

XML_ERR_NONE = 0
XML_ERR_WARNING = 1 : A simple warning
XML_ERR_ERROR = 2 : A recoverable error
XML_ERR_FATAL = 3 : A fatal error