Re: Re: software design clarification

> Right. SourceFile already contains various annotations, such as language
> (C++, C, ...), documentation format (javadoc, ReST, ...), as well as
> various representations of the actual source it contains.
>
> I don't see the need to derive from it, though.

Do any source files exist that are not compilation units?

I imagine that a few attributes will belong to a different abstraction 
level.
http://en.wikipedia.org/wiki/Push_Down

Regards,
Markus