1. A method comprising: matching one or more sub strings of a data string to one or more sub strings of a data set; determining that a particular substring of the one or more substrings of the data string corresponds to a highest priority value among one or more priority values mapped to one or more encodings for the one or more substrings of the data string; and encoding, in dependence upon the particular substring of the data string corresponding to the highest priority value, the data string into an encoding that encodes the particular substring of the one or more substrings of the data string.