WG11 status

[David Price]

Hi Dave,

Just trying to make sure people keep clear that SUPERTYPE OF constraints do
not disappear in E2 which could be read into saying it was replaced by
SUBTYPE_CONSTRAINT. "Deprecated" and "replaced" don't mean the same thing.
If there's never an EXPRESS 3 then SUPERTYPE OF being "deprecated" actually
has no impact at all.  That said, I imagine that once SUBTYPE_CONSTRAINT is
implemented people will stop writing new SUPERTYPE OF constraints since the
new construct is technically superior.... that's why we added it!

David

> -----Original Message-----
> From: Dave Loffredo [mailto:loffredo at steptools.com]
> Sent: 2001 October 19 16:26
> To: david.price at eurostep.com
> Cc: wg11 at steptools.com
> Subject: Re: WG11 status
>
>
> >>>>> "David" == David Price <david.price at eurostep.com> writes:
>
> David> Just a note about an error in N179 and the new EXPRESS
> David> constructs.  The SUBTYPE_CONSTRAINT does not "replace" the
> David> SUPERTYPE OF constraint. It performs the same function but
> David> SUPERTYPE OF remains valid for upward compatibility reasons.
>
> My understanding from Phil and subsequent reading of the document
> is that SUPERTYPE OF will be deprecated, i.e. replaced, don't use it,
> keep away, etc.
>
> 						- Dave
>
>