isBIG5                  Indicate whether the encoding of input string
                        is BIG5.
isGBK                   Indicate whether the encoding of input string
                        is GBK.
isUTF8                  Indicate whether the encoding of input string
                        is UTF-8.
pullword                R Interface of PullWord service
toUTF8                  Convert encoding of Chinese string to UTF-8.
