hi! Am Tue, 24 Jan 2006 22:32:36 -0600 schrieb whit:
> howdy philip! just getting back to this. thanks for your input ;) > > Philipp von Weitershausen wrote: >> whit wrote: >> >>>sorry for the cross post, but I know there are a number of other >>>reference engines out there and I would like to get input as we look >>>at moving the AT ref engine being a component. >>> >>>here is a rough list of steps: >>> >>>1) move current storage of references to use IAnnotations for new >>>content / reference classes. Create a layer of indirection, making >>>reference storage a configurable option. >>> >>>2) refactor UID storage to use IAnnotations >> >> >> I don't think neither references nor UID capabilities have to do with >> annotations. In fact, Zope 3 doesn't use annotations for either one: > > noted...currently, in AT, references are stored in an annotation pattern > (actually as a Folder stored as an attr on the holding object). The > reimplementation requires some sort of persistent storage, and the > reference objects aren't content so storing them as using IAnnotation > seemed logical. > Currently, references are very contentish. some sort of persistence > mechanism will be required, though the behavior on a reference can be > abstracted out through adapters, so what the object is created from > matters less. > > But they have to go somewhere...any suggestions? Well, at the moment archetypes allows real contentish references. In UML this is called also an "Assocation-Class". We're using this heavily in ZUCCARO. However this is implemented, the feature is a must have. > >> - UID capabilities: Zope 3 has the intid utility which allows one to >> assign any object a unique integer id. This should be adopted for Zope >> 2 and I think it would be fairly easy to do wrt persistent objects (as >> the ZODB is the same) > > The AT uid is suppose to be a UUID, thus enabling content migration from > system to system. would it be possible to combine the uuid into a > derivative of the intid utility? I propose to support the different UUID mechanisms described in RFC 4122 "A Universally Unique IDentifier (UUID) URN Namespace" http://www.rfc-editor.org/rfc/rfc4122.txt. I found a nice Python implementation at http://zestyping.livejournal.com/157957.html [...] Jensens -- Jens W. Klein, WEB APPLICATIONS: ZOPE, PLONE - MDA, SOA BlueDynamics Tyrol production: concept, development, design Klein & Partner KEG consulting: analysis, coaching, training http://www.bluedynamics.com management: projects, process, community _______________________________________________ Zope-CMF maillist - Zope-CMF@lists.zope.org http://mail.zope.org/mailman/listinfo/zope-cmf See http://collector.zope.org/CMF for bug reports and feature requests