138 class CWProperty(EntityType):

   139     """used for cubicweb configuration. Once a property has been created you

   140     can't change the key.

   141     """

   142     __permissions__ = {

   143         'read':   ('managers', 'users', 'guests'),

   144         'add':    ('managers', 'users',),

   145         'update': ('managers', 'owners',),

   146         'delete': ('managers', 'owners',),

   147         }

   148     # key is a reserved word for mysql

   149     pkey = String(required=True, internationalizable=True, maxsize=256,

   150                   description=_('defines what\'s the property is applied for. '

   151                                 'You must select this first to be able to set '

   152                                 'value'))

   153     value = String(internationalizable=True, maxsize=256)

   154 

   155     for_user = SubjectRelation('CWUser', cardinality='?*', composite='object',

   156                                description=_('user for which this property is '

   157                                              'applying. If this relation is not '

   158                                              'set, the property is considered as'

   159                                              ' a global property'))

   160 

   161