1 

     2 class para(AttributeRelationType):

     3     permissions = {

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

     5         'add':    ('managers', ERQLExpression('X in_state S, S name "todo"')),

     6         'delete': ('managers', ERQLExpression('X in_state S, S name "todo"')),

     7         }

     8 

     9 class in_state(RelationDefinition):

    10     subject = 'Note'

    11     object = 'State'

    12     cardinality = '1*'

    13     constraints=[RQLConstraint('S is ET, O state_of ET')]

    14     

    15 class wf_info_for(RelationDefinition):

    16     subject = 'TrInfo'

    17     object = 'Note'

    18     cardinality = '1*'