6. The method of claim 1 , further comprising searching the data structure by means of the dictionary which includes tokens by: comparing at least one of said tokens with one of a prefix and a suffix of an entry of said tree.
10. The method of claim 6 , further comprising annotating the tokens in the data structure by: matching at least one of said tokens with an entry of said dictionary comprising an identifier and annotating said token of said data structure with said identifier.