9. The method according to claim 1 , wherein the data describing the document structure model describe at least one group of items within which at least one other group of items is nested, a group of items describing a structure of the items constituting an element, and at least one of the recordings is associated with each group of items and gives information on the minimum and maximum numbers of occurrences of the group as defined by the document structure model.
9. The method according to claim 1 , wherein the data describing the document structure model describe at least one group of items within which at least one other group of items is nested, a group of items describing a structure of the items constituting an element, and at least one of the recordings is associated with each group of items and gives information on the minimum and maximum numbers of occurrences of the group as defined by the document structure model. 13. The method according to claim 9 , wherein a recording of each item in a first group and the at least one recording associated with a group nested in the first group comprise an end-of-group indication indicating whether an item external to the first group is a possible item for succeeding the item or the nested group, according to circumstances.