12. The method according to claim 11 , wherein a plurality of predictions is made for successive structure data, said method comprising: determining whether there exists a succession of correct predictions for structure data, and if a result of said determining step is positive, coding a number of successive correct predictions.
11. The method according to claim 1 , wherein said structured document comprises structure data to be coded, and the method comprising coding a structure data item which comprises the following steps: predicting at least part of the information forming said structure data item, from a coding grammar; if a result of the predicting is positive, encoding a conformity information representing this positive result, and encoding other information of said structure data not included in said predicted part.