an take several different documentary forms. 
This means that the same content can be presented on the screen in several different ways, the 
various types of graphs available in spreadsheet software being one example. In this case, each 
presentation of such a digital object in the limited series of possibilities allowed by the system is 
to be considered as a different view of the same record having stable content and fixed form. 
In addition, one has to consider the concept of “bounded variability,” whic