[schema] explicit imports

i18n/en.po

@@ -203,5 +203,8 @@ msgstr ""
 msgid "thread view"
 msgstr ""
 
+msgid "unknown sender"
+msgstr ""
+
 #~ msgid "see_also"
 #~ msgstr "see also"

i18n/fr.po

@@ -203,6 +203,9 @@ msgstr "sujet"
 msgid "thread view"
 msgstr "vue en enfilade"
 
+msgid "unknown sender"
+msgstr ""
+
 #~ msgid "attachment_plural"
 #~ msgstr "pièces jointes"
 

schema.py

@@ -5,7 +5,12 @@
 :contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
 """
 __docformat__ = "restructuredtext en"
+_ = unicode
 
+# pylint: disable-msg=E0611,F0401
+from yams.buildobjs import (SubjectRelation, RelationType, EntityType, MetaEntityType,
+                            String, Datetime, Int, RelationDefinition)
+from cubicweb.schema import ERQLExpression
 
 class Email(EntityType):
     """electronic mail"""
@@ -78,9 +83,3 @@ if 'Comment' in defined_types:
         object = 'Email'
 
 
-#class Role(Entity):
-#    SubjectRelation('name', 'String')
-
-#class PersonThreadRole(Entity):
-
-