Gary Poster wrote: >>> Frank, I thought vocabularies were being de-emphasized though, in >>> favor of the newer 'sources' component? >>> Vocabularies were good for short lists of choices, but because it >>> read them all into memory at once not so good >>> at lazy evaluation. Sources supposedly uses an iterator and is good >>> for both short and long lists, as I roughly >>> understand it. > > No, actually, both can be used for infinite choices or finite choices. > The primary difference to me is purity: sources break apart the token > functionality--an aspect of display that widgets need--from the data > definition. > > Up until fairly recently (i.e., post-3.2, I believe) you couldn't even > express a finite source. > > There are still more vocabulary widgets than source widgets in > zope.app.form. > > Sources are slated to replace vocabularies, but the uptake has been > slow: I don't know of a hard date.
We can understand vocabularies as a special type of source that's perhaps not as pure in its concept. It works though :). I will continue to document and work with vocabularies for the lack of better alternatives, especially regarding forms. That self-set policy would change if someone actually took it up to deprecate vocabularies. Philipp _______________________________________________ Zope3-users mailing list Zope3email@example.com http://mail.zope.org/mailman/listinfo/zope3-users