--- a/hooks/test/data/schema.py	Thu Jun 11 17:35:11 2015 +0200
+++ b/hooks/test/data/schema.py	Mon Jun 15 10:46:49 2015 +0200
@@ -16,7 +16,13 @@
 # You should have received a copy of the GNU Lesser General Public License along
 # with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
 
-from yams.buildobjs import RelationDefinition, EntityType, String
+from yams.buildobjs import (RelationDefinition, RelationType, EntityType,
+                            String, Datetime, Int)
+from yams.reader import context
+
+from cubicweb.schema import ERQLExpression
+
+_ = unicode
 
 class friend(RelationDefinition):
     subject = ('CWUser', 'CWGroup')
@@ -36,3 +42,44 @@
     subject = 'Folder'
     object = 'Folder'
     composite = 'subject'
+
+
+class Email(EntityType):
+    """electronic mail"""
+    subject   = String(fulltextindexed=True)
+    date      = Datetime(description=_('UTC time on which the mail was sent'))
+    messageid = String(required=True, indexed=True)
+    headers   = String(description=_('raw headers'))
+
+
+
+class EmailPart(EntityType):
+    """an email attachment"""
+    __permissions__ = {
+        'read':   ('managers', 'users', 'guests',), # XXX if E parts X, U has_read_permission E
+        'add':    ('managers', ERQLExpression('E parts X, U has_update_permission E'),),
+        'delete': ('managers', ERQLExpression('E parts X, U has_update_permission E')),
+        'update': ('managers', 'owners',),
+        }
+
+    content  = String(fulltextindexed=True)
+    content_format = String(required=True, maxsize=50)
+    ordernum = Int(required=True)
+
+
+class parts(RelationType):
+    subject = 'Email'
+    object = 'EmailPart'
+    cardinality = '*1'
+    composite = 'subject'
+    fulltext_container = 'subject'
+
+class sender(RelationDefinition):
+    subject = 'Email'
+    object = 'EmailAddress'
+    cardinality = '?*'
+    inlined = True
+
+class recipients(RelationDefinition):
+    subject = 'Email'
+    object = 'EmailAddress'