11. A method of changing a format of a file, comprising the steps of: inputting a first element having a first representation; converting said first element of the first representation to a first element of a second representation; inputting a subsequent element of the first representation, said subsequent element having a plurality of second representations; converting said subsequent element of the first representation to one of said second representations thereof by choosing one of the plurality of said second representations of the subsequent element which is a correct sub-element for said first element.
11. A method of changing a format of a file, comprising the steps of: inputting a first element having a first representation; converting said first element of the first representation to a first element of a second representation; inputting a subsequent element of the first representation, said subsequent element having a plurality of second representations; converting said subsequent element of the first representation to one of said second representations thereof by choosing one of the plurality of said second representations of the subsequent element which is a correct sub-element for said first element. 15. A method according to claim 11, wherein said first format is a textual format and said second format is a binary format and each of said converting steps convert from the textual format to the binary format.