Expose a vocabulary from ATVocabularyManager to be used with dexterity content types

gistfile1.py

"""
This example assumes you have a simple (flat) vocabulay named `available-languages`
in portal_vocabularies

"""

# This would be your vocabularies.py

from Products.CMFCore.utils import getToolByName
from zope.interface import implementer
from zope.schema.interfaces import IVocabularyFactory
from zope.schema.vocabulary import SimpleTerm
from zope.schema.vocabulary import SimpleVocabulary

@implementer(IVocabularyFactory)
class AvailableLanguages(object):

    def __call__(self, context):
        atvm = getToolByName(context, 'portal_vocabularies')
        available_languages = atvm.getVocabularyByName('available-languages')
        terms = []
        for term in available_languages:
            terms.append(SimpleVocabulary.createTerm(
                term, term.encode('utf-8'), available_languages[term].title))
        return SimpleVocabulary(terms)

# In your configure.zcml, register the vocabulary as global utility:

      <utility name="my.product.available-languagess"
             factory=".vocabularies.AvailableLanguages" />


# Then, in your dexterity schema, you can reference this vocabulary
from zope import schema

    available_languages = schema.Set(
        title=_("Available language(s)"),
        required=False,
        value_type=schema.Choice(
            vocabulary="my.product.available-languages",
        ),
    )