[Zope-dev] RFC: RelationAware class for relations between obj ects

[sean.upton@uniontrib.com]

My observations from a digital-media management perspective lead me to
believe that relationships and other metadata are closely intertwined, and
that there needs to be a way to righcly express metatdata about
relationships.

One the subject of simplicity vs. features - it should be said that one
thing that high-level applications would likely need to bolt on top of these
relationships is metadata about those relationships.  In the keep-it-simple
model the descriptor names (Python identifiers, ie self.developers
referencing a relation object) serve as an id for one half of the
relationship, but how does one attach to following to that half of the
relationship:

	- relationship type/model (same as DCMES relation qualifiers)
	- relationship label/plain-text-title
	- content type or class of related object
	- id/reference or path to content
	- potentially some other data?

Examples (warning: long post):
http://mail.zope.org/pipermail/zope-cmf/2002-October/015801.html

In a keep-it-simple model, where does this high-level stuff belong?  In a
global service?

Sean

-----Original Message-----
From: Jeremy Hylton [mailto:jeremy@zope.com]
Sent: Tuesday, April 29, 2003 7:52 AM
To: Steve Alexander
Cc: Shane Hathaway; roche@upfrontsystems.co.za; zope-dev@zope.org;
maxm@mxm.dk
Subject: Re: [Zope-dev] RFC: RelationAware class for relations between
objects


On Tue, 2003-04-29 at 09:59, Steve Alexander wrote:
> There's a way to allow a descriptor (or other thing defined inside a 
> class suite) to do things to the class immediately after the class is 
> created.

Boy, that's a lot of mechanism.  It would be nice if the relation
support could be kept simple.

Jeremy



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