##parameters=key=None 
# $Id: getCertificatesVoc.py 3254 2008-02-28 13:06:20Z 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
raise KeyError