11. The method of claim 10 , wherein selecting the parser among the set of predefined parsers comprises using a table, which includes the plurality of possibilities of configuration of bit setting of the register of bits and a key to point to the configuration of bit setting corresponding to the selected parser.
10. The method of claim 9 , wherein selecting the parser among a set of predefined parsers comprises: using a register of bits, each bit corresponding to a match field; setting each of the bits for a corresponding match field whose associated counter has a count different than an initial value; and selecting the parser corresponding to the set bits among the set of predefined parsers, wherein the set of predefined parser is given by a plurality of possibilities of configuration of bit setting of the register of bits.