2. A method according to claim 1 , wherein the model identifies specific relationships between the elements of the model, and each of the model elements has defined properties, and wherein: at least some of the documents include first and second types of text; the first type of text is retrieved from the properties of the model elements; the second type of text is reproduced verbatim from a template; and the structure of the documents is derived from the structure of the model.
2. A method according to claim 1 , wherein the model identifies specific relationships between the elements of the model, and each of the model elements has defined properties, and wherein: at least some of the documents include first and second types of text; the first type of text is retrieved from the properties of the model elements; the second type of text is reproduced verbatim from a template; and the structure of the documents is derived from the structure of the model. 6. A method according to claim 2 , wherein at least one portion of at least one said documents is associated with a pop-up menu that allows elements and relationships of the model to be created and deleted.