Building and maintaining non-trivial software systems that are independently extensible is a difficult task. This is because the combination of independent extensions tends to produce conflicts that are difficult to anticipate, and to which no general resolution strategy exists. In this paper, we show how some of these conflicts can be avoided if domain-specific contexts are modeled using a rep...

We address the problem of integrating classes that are developed independently. We propose to factorise the intensional and extensional dimensions of classes and let them be organised in separate hierarchies. Class integration becomes the problem of integrating extent graphs, and to describe relations between the properties of the classes to be integrated. Our approach may be seen as extending ...

We show that cr(G) ≤ (2 iocr(G) 2 ) settling an open problem of Pach and Tóth [5,1]. Moreover, iocr(G) = cr(G) if iocr(G) ≤ 2.

The terms component and component framework are currently used di erently depending on context and products Di erent understandings can be found for instance with Delphi OpenDoc and Oberon F We believe that the purpose of software components is to create a compo nent market The basic technology for this are independently extensible soft ware systems Independently extensible software in turn req...