More than a basic aggregation of objects, a program can be modelled as a semantically rich structure of micro-components.
In this paper, we study program construction, our starting point being the object-oriented framework requirements. We put
under the lights the component form which matches our reuse goals - the ”lens” - and we show that it is possible to identify
clearly the program structure as a set of ”semantic flows”. For example, in a graphical user interface, a drawing flow manages
and orders the displayed components.
This program model enables complex, rich and free structuring. Prevented from unsound component adaptation or composition,
the programmer is free to define his own structural flows.