[Zope] get non-acquired attributes of an instance

hello, is it possible to get the list of all an object's attributes, excepted the ones acquired from parents ? thanks -- Thomas Desvenain Junior Plone/Zope analyst-developer, Looking for a Job ! Now, trainee at Institut National de Recherche Agronomique Mathématiques, Informatique et Génôme laboratory 78350 Jouy en Josas +33 (0)1 34 65 29 43