DFDL Parser-IIB(IBM INtegration Bus)

Question

I have a dfdl configured for HTTPInput node which receives data from HTTP POST. I get the data in encoded format. ex:

                 %2412%2C843.40    

                10%2F01%2F2014

The equivalent values are $12,843.40 and 10/01/2014

Is there any option in DFDL to make the incoming hexa values parse into normal values as like above