Re: class proposal 3.1

Mark Hahn wrote:
> 1) The class is a blueprint only.

I disagree. The class is a type, a factory and a blueprint. You
should not try to mix the type with a blueprint. Imagine two
banknotes: 5 dollars and 10 dollars. Their type is designated
in English language with the word 'banknote'. Things you can do
with the word 'banknote' differ from things you can do with a
banknote. Instead there is an association between the word
banknote and a typical banknote image in your head. This idea
is captured in my proposal where attribute instance_ acts as
an association pointing to a typical instance.
Imagine a drunk man who is so drunk that he can't remember the
word banknote but still remembers typical banknote. He will
say to you "Give me that thing with a portrait". You cannot
easily understand what he's talking about unless you start
pattern search. That is a "proof" that type != blueprint :-)


  -- Serge