[Zope3-dev] RE: annotations/dc and component definitions

[Tres Seaver]

On Wed, 2003-04-30 at 11:23, R. David Murray wrote:
> On Wed, 30 Apr 2003, Garrett Smith wrote:
> > The "surprise" is in seeing a "Metadata" tab pop up in the ZMI for my
> > content as soon as I implement IAttributeAnnotatable. It would have been
> > less surprising if I implemented something like
> > IAttributeAnnotatableMetadata.
> 
> You'll see (or not see but experience) more things than that
> "popping up" in the future by telling a class to implement that
> particular interface.  A lot of things will probably use the
> annotation system.

This is actually a wart, for me.  I don't believe that the
"DWIM"-ishness fits the rest of what we do in Zope3.  We already have a
marker interface which should be used for the "Metadata" tab: 
'zope.app.interfaces.dublincore.IZopeDublinCoreAnnotable'.

The wiring between IAA and IZDCA should be more explicit, and *much*
easier to control;  otherwise I can't make fine-grained policy choices
(e.g., I can't have objects which use annotations to store workflow
history, but put metadata in an RDBMS, or vice versa).

Tres.
-- 
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Tres Seaver                                tseaver@zope.com
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