schemas/bootstrap.py
author Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
Fri, 29 May 2009 21:34:09 +0200
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"""core CubicWeb schema necessary for bootstrapping the actual application's schema
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:organization: Logilab
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:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
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"""
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from cubicweb.schema import format_constraint
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# not restricted since as "is" is handled as other relations, guests need
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# access to this
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class CWEType(MetaEntityType):
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    """define an entity type, used to build the application schema"""
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    name = String(required=True, indexed=True, internationalizable=True,
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                  unique=True, maxsize=64)
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    description = RichString(internationalizable=True,
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                             description=_('semantic description of this entity type'))
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    meta = Boolean(description=_('is it an application entity type or not ?'))
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    # necessary to filter using RQL
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    final = Boolean(description=_('automatic'))
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class CWRType(MetaEntityType):
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    """define a relation type, used to build the application schema"""
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    name = String(required=True, indexed=True, internationalizable=True,
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                  unique=True, maxsize=64)
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    description_format = String(meta=True, internationalizable=True, maxsize=50,
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                                default='text/plain', constraints=[format_constraint])
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    description = String(internationalizable=True,
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                         description=_('semantic description of this relation type'))
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    meta = Boolean(description=_('is it an application relation type or not ?'))
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    symetric = Boolean(description=_('is this relation equivalent in both direction ?'))
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    inlined = Boolean(description=_('is this relation physically inlined? you should know what you\'re doing if you are changing this!'))
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    fulltext_container = String(description=_('if full text content of subject/object entity '
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                                              'should be added to other side entity (the container).'),
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                                vocabulary=('', _('subject'), _('object')),
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                                maxsize=8, default=None)
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    final = Boolean(description=_('automatic'))
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class CWAttribute(MetaEntityType):
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    """define a final relation: link a final relation type from a non final
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    entity to a final entity type.
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    used to build the application schema
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    """
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    relation_type = SubjectRelation('CWRType', cardinality='1*',
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                                    constraints=[RQLConstraint('O final TRUE')],
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                                    composite='object')
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    from_entity = SubjectRelation('CWEType', cardinality='1*',
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                                  constraints=[RQLConstraint('O final FALSE')],
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                                  composite='object')
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    to_entity = SubjectRelation('CWEType', cardinality='1*',
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                                constraints=[RQLConstraint('O final TRUE')],
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                                composite='object')
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    constrained_by = SubjectRelation('CWConstraint', cardinality='*1', composite='subject')
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    cardinality = String(maxsize=2, internationalizable=True,
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                         vocabulary=[_('?1'), _('11')],
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                         description=_('subject/object cardinality'))
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    ordernum = Int(description=('control subject entity\'s relations order'), default=0)
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    indexed = Boolean(description=_('create an index for quick search on this attribute'))
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    fulltextindexed = Boolean(description=_('index this attribute\'s value in the plain text index'))
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    internationalizable = Boolean(description=_('is this attribute\'s value translatable'))
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    defaultval = String(maxsize=256)
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    description_format = String(meta=True, internationalizable=True, maxsize=50,
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                                default='text/plain', constraints=[format_constraint])
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    description = String(internationalizable=True,
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                         description=_('semantic description of this attribute'))
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CARDINALITY_VOCAB = [_('?*'), _('1*'), _('+*'), _('**'),
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                     _('?+'), _('1+'), _('++'), _('*+'),
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                     _('?1'), _('11'), _('+1'), _('*1'),
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                     _('??'), _('1?'), _('+?'), _('*?')]
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class CWRelation(MetaEntityType):
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    """define a non final relation: link a non final relation type from a non
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    final entity to a non final entity type.
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    used to build the application schema
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    """
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    relation_type = SubjectRelation('CWRType', cardinality='1*',
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                                    constraints=[RQLConstraint('O final FALSE')],
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                                    composite='object')
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    from_entity = SubjectRelation('CWEType', cardinality='1*',
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                                  constraints=[RQLConstraint('O final FALSE')],
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                                  composite='object')
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    to_entity = SubjectRelation('CWEType', cardinality='1*',
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                                constraints=[RQLConstraint('O final FALSE')],
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                                composite='object')
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    constrained_by = SubjectRelation('CWConstraint', cardinality='*1', composite='subject')
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    cardinality = String(maxsize=2, internationalizable=True,
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                         vocabulary=CARDINALITY_VOCAB,
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                         description=_('subject/object cardinality'))
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    ordernum = Int(description=_('control subject entity\'s relations order'),
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                   default=0)
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    composite = String(description=_('is the subject/object entity of the relation '
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                                     'composed of the other ? This implies that when '
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                                     'the composite is deleted, composants are also '
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                                     'deleted.'),
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                       vocabulary=('', _('subject'), _('object')),
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                       maxsize=8, default=None)
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    description_format = String(meta=True, internationalizable=True, maxsize=50,
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                                default='text/plain', constraints=[format_constraint])
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    description = String(internationalizable=True,
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                         description=_('semantic description of this relation'))
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# not restricted since it has to be read when checking allowed transitions
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class RQLExpression(MetaEntityType):
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    """define a rql expression used to define permissions"""
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    exprtype = String(required=True, vocabulary=['ERQLExpression', 'RRQLExpression'])
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    mainvars = String(maxsize=8,
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                      description=_('name of the main variables which should be '
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                                    'used in the selection if necessary (comma '
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                                    'separated)'))
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    expression = String(required=True,
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                        description=_('restriction part of a rql query. '
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                                      'For entity rql expression, X and U are '
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                                      'predefined respectivly to the current object and to '
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                                      'the request user. For relation rql expression, '
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                                      'S, O and U are predefined respectivly to the current '
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                                      'relation\'subject, object and to '
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                                      'the request user. '))
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    read_permission = ObjectRelation(('CWEType', 'CWRType'), cardinality='+?', composite='subject',
0
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                                      description=_('rql expression allowing to read entities/relations of this type'))
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    add_permission = ObjectRelation(('CWEType', 'CWRType'), cardinality='*?', composite='subject',
0
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                                     description=_('rql expression allowing to add entities/relations of this type'))
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    delete_permission = ObjectRelation(('CWEType', 'CWRType'), cardinality='*?', composite='subject',
0
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                                        description=_('rql expression allowing to delete entities/relations of this type'))
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    update_permission = ObjectRelation('CWEType', cardinality='*?', composite='subject',
0
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                                        description=_('rql expression allowing to update entities of this type'))
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0
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class CWConstraint(MetaEntityType):
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    """define a schema constraint"""
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    cstrtype = SubjectRelation('CWConstraintType', cardinality='1*')
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    value = String(description=_('depends on the constraint type'))
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class CWConstraintType(MetaEntityType):
0
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    """define a schema constraint type"""
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    name = String(required=True, indexed=True, internationalizable=True,
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                  unique=True, maxsize=64)
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# not restricted since it has to be read when checking allowed transitions
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class CWGroup(MetaEntityType):
0
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    """define a CubicWeb users group"""
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    name = String(required=True, indexed=True, internationalizable=True,
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                  unique=True, maxsize=64)
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    read_permission = ObjectRelation(('CWEType', 'CWRType'), cardinality='+*',
0
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                                      description=_('groups allowed to read entities/relations of this type'))
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    add_permission = ObjectRelation(('CWEType', 'CWRType'),
0
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                                     description=_('groups allowed to add entities/relations of this type'))
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    delete_permission = ObjectRelation(('CWEType', 'CWRType'),
0
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                                        description=_('groups allowed to delete entities/relations of this type'))
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    update_permission = ObjectRelation('CWEType',
0
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                                        description=_('groups allowed to update entities of this type'))
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0
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class relation_type(MetaRelationType):
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    """link a relation definition to its relation type"""
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    inlined = True
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class from_entity(MetaRelationType):
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    """link a relation definition to its subject entity type"""
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    inlined = True
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class to_entity(MetaRelationType):
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    """link a relation definition to its object entity type"""
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    inlined = True
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class constrained_by(MetaRelationType):
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    """constraints applying on this relation"""
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0
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class cstrtype(MetaRelationType):
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    """constraint factory"""
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    inlined = True
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class read_permission(MetaRelationType):
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    """core relation giving to a group the permission to read an entity or
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    relation type
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    """
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class add_permission(MetaRelationType):
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    """core relation giving to a group the permission to add an entity or
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    relation type
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    """
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class delete_permission(MetaRelationType):
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    """core relation giving to a group the permission to delete an entity or
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    relation type
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    """
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class update_permission(MetaRelationType):
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    """core relation giving to a group the permission to update an entity type
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    """
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class is_(MetaRelationType):
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    """core relation indicating the type of an entity
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    """
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    name = 'is'
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    # don't explicitly set composite here, this is handled anyway
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    #composite = 'object'
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    permissions = {
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        'read':   ('managers', 'users', 'guests'),
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        'add':    (),
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        'delete': (),
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        }
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    cardinality = '1*'
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    subject = '**'
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    object = 'CWEType'
0
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class is_instance_of(MetaRelationType):
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    """core relation indicating the types (including specialized types)
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    of an entity
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    """
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    # don't explicitly set composite here, this is handled anyway
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    #composite = 'object'
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    permissions = {
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        'read':   ('managers', 'users', 'guests'),
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        'add':    (),
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        'delete': (),
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        }
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    cardinality = '+*'
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    subject = '**'
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    object = 'CWEType'
0
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class specializes(MetaRelationType):
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    name = 'specializes'
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    permissions = {
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        'read':   ('managers', 'users', 'guests'),
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        'add':    ('managers',),
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        'delete': ('managers',),
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        }
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    cardinality = '?*'
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    subject = 'CWEType'
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    object = 'CWEType'