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Re: inheritance semantics in Self 4.0
Parent priorities were actually eliminated in 3.0, as was enforcement
of the old privacy semantics.
4.0 makes much more use of copy-downs for sharing, but otherwise not
much has changed. Privacy has been removed entirely from the
language, but is still supported by the environment as a kind of
structured comment. The lookup is the same as in 3.0, and is
described in the 3.0 language manual.
4.0 should be out Real Soon Now -- watch this space!