I'll try to make the ISource API smooth and usable for other components. Right now ISource provides no simple API for work with terms. Since a ISource only provides a __contains__ method and the IterableSource the __iter__ method, there is some more needed which makes it easy to work with terms next to the ISourceQueriables API. The zope.app.form.browser.interfaces.ITerms defines one possible way to make it work like a vocabulary because it defines the methods getTerm(value) and getValue(token). The z3c.form.interfaces.ITerms defines also such a query API but right now only or vocabularies. I propose to define such a ITerms interface in zope.schema.interfaces which makes it possible to implement simple ISource terms and work with the ITerm values like we do in vocabularies. This whould not affect other implementations like the ISourceQueriables etc. It only offers the a way to implement reusable simple ISource components without the need that every UI framework needs to implement their own interfaces for query ISource component in their own way (e.g. ITerms). The current state of ISource/ITerms concept whould not work if someone will switch form zope.app.form based sources to z3c.form based sources because of it's different ITerms implementations. Or if someone defines a zope.schema.ISource in a 3rd party package, the zope.app.form.browser.interfaces.ITerms is often used for query ITerms even if it's only used in python code without any form framework. That's a real bad dependency. Fazit, The only query API defined for ISource in zope.schema is the ISourceQueriables API. That's defently to less and makes it required to implement custom query APIs in UI frameworks if we need to work with terms. I no one objects, I'll start a zope.schema branch and let you know about the progress and a hopfully a simple solution. Additional to them I started allready a z3c.form branch for adjust the ITerms implementation. As far as I can see right now this refactoring will only provides additional features. What do you think? Any objections or hints about that? Regards Roger Ineichen _____________________________ Projekt01 GmbH www.projekt01.ch Boesch 65 6331 Hünenberg phone +41 (0)41 781 01 78 mobile +41 (0)79 340 52 32 fax +41 (0)41 781 00 78 email roger.ineichen@projekt01.ch _____________________________ END OF MESSAGE