Thanks, Markus!

I'm a little relieved that not everything *has* to be a pattern. I guess I got a little over-enthusiastic! I'll take a deep breath now and settle down ;)

Regards-

>I'm not exactly sure what pattern this would be. Generally, patterns more often deal with object interaction than subclassing. Looks to me like this is good example for proper abstraction, but not any other pattern I'm aware of. (Of course, there are hundreds of patterns and almost everything can be called a pattern, but I haven#t seen this in any of the major catalogs...)