1 class Salesterm(EntityType):

     2     described_by_test = SubjectRelation('File', cardinality='1*', composite='subject')

     3     amount = Int(constraints=[IntervalBoundConstraint(0, 100)])

     4     

     5 class tags(RelationDefinition):

     6     subject = 'Tag'

     7     object = ('BlogEntry', 'EUser')

     8 

     9 class checked_by(RelationType):

    10     subject = 'BlogEntry'

    11     object = 'EUser'

    12     cardinality = '?*'

    13     permissions = {

    14         'add': ('managers',),

    15         'read': ('managers', 'users'),

    16         'delete': ('managers',),

    17         }