Can anyone confirm this and explain the differences among those packages?
Originally all the schema directives (i.e. widget, mode, omitted, no_omit, etc) were implemented using grok in plone.directives.form. At some point Laurence re-implemented them in a way that does not use grok. So for Dexterity 2.0 I moved those implementations to plone.autoform (leaving backwards-compatibility imports in plone.directives.form) so that it's possible to use Dexterity without depending on grok. plone.directives.form can still do some additional grok-style things, like registering form classes and validators. But that's available to developers who want to use grok; we should not use it in core. plone.autoform is the right place to import the schema directives from these days.
thanks, David; I think it would be a good idea to update the Dexterity documentation at some point to remove references on plone.directives.* packages from it.
I agree! Please feel free; I don't really have time/interest to work on Dexterity these days.
Help is more than welcome
yes, I know; I fixed some bugs that were screaming on the documentation last week but now I have no time until next training.
this is WIP and it will take me time; if someone wants to join, feel free to push to that branch.