Richard Moon writes:

But what we have here is an object, a dtml method, which behaves completely differently depending on how it is referenced.

Can anyone tell me why that is a good thing ? To me it seems a very bad thing. I like it very much!

It allows to use a single object in different contexts and to have its behaviour adapted to these contexts. In fact, the behaviour is not completely different: it is still controlled by the same code/algorithm. But the different contexts lead to slightly different behaviour, influenced by the context. You have similar effects in object orientend languages with dynamic method resolution. Dieter