##parameters=key=None 
# $Id: getCertificatesVoc.py 2727 2007-11-21 14:12:30Z joachim $
"""
Return the faculties as an vocabulary

"""
if key is None:
    res = context.portal_catalog.search({'meta_type': "Certificate"})    
    return [(d.getId,d.Title,) for d in res]
res = context.portal_catalog.search({'meta_type': "Certificate", 'id': key})
if res:
    return [-1].Title
return "unknown Faculty %s" % key