diff --git a/composer/schema/factory.py b/composer/schema/factory.py
index 3365668..fc74718 100644
--- a/composer/schema/factory.py
+++ b/composer/schema/factory.py
@@ -62,19 +62,18 @@ class SchemaFactory(object):
         fields = []
         for fname in schema.getFieldNamesInOrder(interface):
             field = interface[fname]
-            if field.__class__ in fieldMapping:
-                info = fieldMapping[field.__class__]
-                voc = (getattr(field, 'vocabulary', ()) or
-                       getattr(field, 'vocabularyName', None))
-                f = Field(field.getName(),
-                        fieldType=info[0],
-                        required=field.required,
-                        default=field.default,
-                        default_method=getattr(field, 'default_method', None),
-                        vocabulary=voc,
-                        title=field.title,
-                        description=field.description,
-                        readonly=field.readonly,
-                        nostore=getattr(field, 'nostore', False),)
-                fields.append(f)
+            info = fieldMapping.get(field.__class__) or ('textline',)
+            voc = (getattr(field, 'vocabulary', ()) or
+                   getattr(field, 'vocabularyName', None))
+            f = Field(field.getName(),
+                    fieldType=info[0],
+                    required=field.required,
+                    default=field.default,
+                    default_method=getattr(field, 'default_method', None),
+                    vocabulary=voc,
+                    title=field.title,
+                    description=field.description,
+                    readonly=field.readonly,
+                    nostore=getattr(field, 'nostore', False),)
+            fields.append(f)
         return Schema(name=interface.__name__, *fields, **kw)
diff --git a/composer/schema/field.py b/composer/schema/field.py
index fc17349..60874c9 100644
--- a/composer/schema/field.py
+++ b/composer/schema/field.py
@@ -50,6 +50,12 @@ class Field(Component):
     default = None
     default_method = None
 
+    fieldTypeInfo = None
+    instance_name = None
+    display_renderer = None
+    display_format = None
+
+
     def __init__(self, name, title=None, fieldType='textline', **kw):
         assert name
         self.__name__ = name
@@ -80,6 +86,10 @@ class Field(Component):
     def inputRenderer(self):
         return self.getFieldTypeInfo().inputRenderer
 
+    @property
+    def displayRenderer(self):
+        return self.display_renderer or self.getFieldTypeInfo().displayRenderer
+
     @property
     def storeData(self):
         return not self.nostore and self.getFieldTypeInfo().storeData
@@ -100,10 +110,10 @@ class Field(Component):
             return [dict(token=t.token, title=t.title or t.value) for t in voc]
 
     def getFieldTypeInfo(self):
-        return fieldTypes.getTerm(self.fieldType)
+        return self.fieldTypeInfo or fieldTypes.getTerm(self.fieldType)
 
     def getFieldInstance(self, clientInstance=None):
-        instanceName = self.getFieldTypeInfo().instanceName
+        instanceName = self.instance_name or self.getFieldTypeInfo().instanceName
         fi = component.getAdapter(self, IFieldInstance, name=instanceName)
         fi.clientInstance = clientInstance
         return fi
@@ -193,9 +203,10 @@ class DateFieldInstance(NumberFieldInstance):
             return ''
         view = self.clientInstance.view
         langInfo = view and view.languageInfo or None
+        format = self.context.display_format or ('dateTime', 'short')
         if langInfo:
             locale = locales.getLocale(langInfo.language)
-            fmt = locale.dates.getFormatter('dateTime', 'short')
+            fmt = locale.dates.getFormatter(*format)
             return fmt.format(value)
         return str(value)
 
diff --git a/composer/schema/interfaces.py b/composer/schema/interfaces.py
index 7966904..9983ffd 100644
--- a/composer/schema/interfaces.py
+++ b/composer/schema/interfaces.py
@@ -74,6 +74,7 @@ class FieldType(SimpleTerm):
         self.name = value
         self.fieldRenderer = 'field'
         self.inputRenderer = 'input_' + self.name
+        self.displayRenderer = 'display_textline'
         self.storeData = True
         self.instanceName = ''
         for k, v in kw.items():
diff --git a/organize/task.py b/organize/task.py
index 80f1011..c0e480a 100644
--- a/organize/task.py
+++ b/organize/task.py
@@ -1,5 +1,5 @@
 #
-#  Copyright (c) 2006 Helmut Merz helmutm@cy55.de
+#  Copyright (c) 2008 Helmut Merz helmutm@cy55.de
 #
 #  This program is free software; you can redistribute it and/or modify
 #  it under the terms of the GNU General Public License as published by
@@ -25,6 +25,10 @@ $Id$
 from zope.component import adapts
 from zope.interface import implements
 
+from cybertools.organize.interfaces import ITask
+
 
 class Task(object):
 
+    implements(ITask)
+