diff --git a/browser/configure.zcml b/browser/configure.zcml
index b7aa99b..40f90df 100644
--- a/browser/configure.zcml
+++ b/browser/configure.zcml
@@ -580,14 +580,6 @@
       permission="zope.ManageContent"
       />
 
-  <zope:view
-      type="zope.publisher.interfaces.browser.IBrowserRequest"
-      for="loops.interfaces.IFile"
-      provides="zope.app.form.interfaces.IInputWidget"
-      factory="loops.browser.form.UploadWidget"
-      permission="zope.Public"
-      />
-
   <!-- inner HTML views -->
 
   <page
diff --git a/browser/form.py b/browser/form.py
index ac1d960..fb4100a 100644
--- a/browser/form.py
+++ b/browser/form.py
@@ -41,8 +41,8 @@ from zope.security.proxy import isinstance, removeSecurityProxy
 from cybertools.ajax import innerHtml
 from cybertools.browser.form import FormController
 from cybertools.composer.interfaces import IInstance
+from cybertools.composer.schema.interfaces import ISchemaFactory
 from cybertools.composer.schema.browser.common import schema_macros, schema_edit_macros
-from cybertools.composer.schema.util import getSchemaFromInterface
 from cybertools.typology.interfaces import IType, ITypeManager
 from loops.common import adapted
 from loops.concept import Concept, ResourceRelation
@@ -58,26 +58,6 @@ from loops.util import _
 from loops.versioning.interfaces import IVersionable
 
 
-# special widgets
-
-class UploadWidget(FileWidget):
-
-    def _toFieldValue(self, input):
-        # not used at the moment as the context object is updated
-        # via EditObject.updateFields()
-        fn = getattr(input, 'filename', '') # zope.publisher.browser.FileUpload
-        self.request.form['filename'] = fn
-        if input:
-            self.request.form['_tempfilename'] = input.headers.get('_tempfilename')
-        # f = self.context
-        # f.extfiledata = tempfilename  # provide for rename
-        if fn:
-            contentType = guess_content_type(fn)
-            if contentType:
-                request.form['form.contentType'] = contentType
-        return super(UploadWidget, self)._toFieldValue(input)
-
-
 # forms
 
 class ObjectForm(NodeView):
@@ -91,7 +71,13 @@ class ObjectForm(NodeView):
     def __init__(self, context, request):
         super(ObjectForm, self).__init__(context, request)
 
-    # cybertools.composer.schema support
+    @Lazy
+    def adapted(self):
+        return adapted(self.context)
+
+    @Lazy
+    def typeInterface(self):
+        return IType(self.context).typeInterface or ITextDocument
 
     @property
     def schemaMacros(self):
@@ -103,10 +89,13 @@ class ObjectForm(NodeView):
 
     @Lazy
     def schema(self):
-        return getSchemaFromInterface(self.typeInterface, manager=self)
+        schemaFactory = component.getAdapter(self.adapted, ISchemaFactory)
+        return schemaFactory(self.typeInterface, manager=self,
+                             request=self.request)
 
     @Lazy
     def fields(self):
+        return self.schema.fields
         fields = self.schema.fields
         fields.data.height = 10
         ifc = self.typeInterface
@@ -130,41 +119,12 @@ class ObjectForm(NodeView):
     def instance(self):
         return IInstance(adapted(self.context))
 
-    # zope.formlib support
-
-    @property
-    def form_fields(self):
-        ifc = self.typeInterface
-        ff = FormFields(ifc)
-        if ifc in widgetControllers:
-            wc = widgetControllers[ifc](self.context, self.request)
-            ff = wc.modifyFormFields(ff)
-        return ff
-
-    def setUp(self):
-        if self._isSetUp:
-            return
-        self.setUpWidgets()
-        desc = self.widgets.get('description')
-        if desc:
-            desc.height = 2
-        if self.typeInterface in widgetControllers:
-            wc = widgetControllers[self.typeInterface](self.context, self.request)
-            wc.modifyWidgetSetup(self.widgets)
-        self._isSetUp = True
-
-    # general methods
-
     def __call__(self):
         response = self.request.response
         response.setHeader('Expires', 'Sat, 1 Jan 2000 00:00:00 GMT')
         response.setHeader('Pragma', 'no-cache')
         return innerHtml(self)
 
-    @Lazy
-    def typeInterface(self):
-        return IType(self.context).typeInterface or ITextDocument
-
     @Lazy
     def defaultPredicate(self):
         return self.loopsRoot.getConceptManager().getDefaultPredicate()
@@ -194,55 +154,6 @@ class ObjectForm(NodeView):
                  for o in result])
 
 
-class WidgetController(object):
-
-    def __init__(self, context, request):
-        self.context = context
-        self.request = request
-
-    def modifySchemaFields(self, fields):
-        pass
-
-    def modifyFormFields(self, formFields):
-        return formFields
-
-    def modifyWidgetSetup(self, widgets):
-        pass
-
-
-class NoteWidgetController(WidgetController):
-
-    def modifySchemaFields(self, fields):
-        del fields['description']
-        fields.data.height = 5
-
-    def modifyFormFields(self, formFields):
-        return formFields.omit('description')
-
-    def modifyWidgetSetup(self, widgets):
-        widgets['data'].height = 5
-
-
-class FileWidgetController(WidgetController):
-
-    def modifySchemaFields(self, fields):
-        if self.request.principal.id != 'rootadmin':
-            del fields['contentType']
-
-
-    def modifyFormFields(self, formFields):
-        if self.request.principal.id == 'rootadmin':
-            return formFields
-        return formFields.omit('contentType')
-
-
-widgetControllers = {
-    INote: NoteWidgetController,
-    IFile: FileWidgetController,
-    IExternalFile: FileWidgetController,
-}
-
-
 class EditObjectForm(ObjectForm, EditForm):
 
     @property
@@ -275,13 +186,13 @@ class CreateObjectForm(ObjectForm, Form):
     form_action = 'create_resource'
     dialog_name = 'create'
 
-    # cybertools.composer.schema support
+    @Lazy
+    def adapted(self):
+        return self.typeInterface(Resource())
 
     @Lazy
     def instance(self):
-        return IInstance(Concept())
-
-    # general methods
+        return IInstance(Resource())
 
     @Lazy
     def typeInterface(self):
@@ -307,13 +218,16 @@ class CreateObjectForm(ObjectForm, Form):
 class InnerForm(CreateObjectForm):
 
     @property
-    #def macro(self): return self.template.macros['fields']
     def macro(self): return self.schemaMacros['fields']
 
 
 # processing form input
 
 class EditObject(FormController):
+    """ Note that ``self.context`` of this adapter may be different from
+        ``self.object``, the object it acts upon, e.g. when this object
+        is created during the update processing.
+    """
 
     prefix = 'form.'
     conceptPrefix = 'assignments.'
@@ -321,9 +235,18 @@ class EditObject(FormController):
     old = None
     selected = None
 
+    @Lazy
+    def adapted(self):
+        return adapted(self.object)
+
+    @Lazy
+    def typeInterface(self):
+        return IType(self.object).typeInterface or ITextDocument
+
     @Lazy
     def schema(self):
-        return getSchemaFromInterface(self.typeInterface, manager=self)
+        schemaFactory = component.getAdapter(self.adapted, ISchemaFactory)
+        return schemaFactory(self.typeInterface)
 
     @Lazy
     def fields(self):
@@ -331,12 +254,7 @@ class EditObject(FormController):
 
     @Lazy
     def instance(self):
-        return component.getAdapter(adapted(self.object), IInstance, name='editor')
-        #return IInstance(adapted(self.object), name='editor')
-
-    @Lazy
-    def typeInterface(self):
-        return IType(self.object).typeInterface or ITextDocument
+        return component.getAdapter(self.adapted, IInstance, name='editor')
 
     @Lazy
     def loopsRoot(self):
@@ -398,50 +316,6 @@ class EditObject(FormController):
     def fieldHandlers(self):
         return dict(fileupload=self.handleFileUpload)
 
-    def xupdateFields(self):  # obsolete
-        obj = self.object
-        errors = {}
-        form = self.request.form
-        ti = IType(obj).typeInterface
-        if ti is not None:
-            adapted = ti(obj)
-        else:
-            adapted = obj
-        for k in form.keys():
-            # TODO: use self.view.form_fields or better: IInstance(adapted)
-            if k.startswith(self.prefix):
-                fn = k[len(self.prefix):]
-                if fn in ('action', 'type', 'data.used') or fn.endswith('-empty-marker'):
-                    continue
-                value = form[k]
-                if fn.startswith(self.conceptPrefix) and value:
-                    self.collectConcepts(fn[len(self.conceptPrefix):], value)
-                else:
-                    if not value and fn == 'data' and IFile.providedBy(adapted):
-                        # empty file data - don't change
-                        continue
-                    if isinstance(value, FileUpload):
-                        filename = getattr(value, 'filename', '')
-                        value = value.read()
-                        if filename:
-                            #self.request.form['filename'] = filename
-                            contentType = guess_content_type(filename, value[:100])
-                            if contentType:
-                                ct = contentType[0]
-                                self.request.form['form.contentType'] = ct
-                                adapted.contentType = ct
-                            adapted.localFilename = filename
-                    if fn == 'title' and not value:
-                        # TODO: provide general validation mechanism
-                        errors[fn] = 'Field %s must not be empty' % fn
-                    else:
-                        # TODO: provide unmarshalling depending on field type
-                        setattr(adapted, fn, value)
-        if self.old or self.selected:
-            self.assignConcepts(obj)
-        notify(ObjectModifiedEvent(obj))
-        return errors
-
     def collectConcepts(self, fieldName, value):
         if self.old is None: self.old = []
         if self.selected is None: self.selected = []
diff --git a/configure.zcml b/configure.zcml
index 896deb5..6ffa57d 100644
--- a/configure.zcml
+++ b/configure.zcml
@@ -392,7 +392,6 @@
              interface="zope.filerepresentation.interfaces.IFileFactory" />
   </class>
 
-
   <adapter factory="cybertools.composer.schema.instance.Instance" />
   <adapter factory="cybertools.composer.schema.instance.Editor"
            name="editor" />
@@ -402,6 +401,11 @@
   <adapter factory="cybertools.composer.schema.field.FileUploadFieldInstance"
            name="fileupload" />
 
+  <adapter factory="loops.schema.ResourceSchemaFactory" />
+  <adapter factory="loops.schema.ResourceSchemaFactory"
+           for="loops.interfaces.IResource" />
+  <adapter factory="loops.schema.FileSchemaFactory" />
+  <adapter factory="loops.schema.NoteSchemaFactory" />
 
   <adapter factory="loops.setup.SetupManager" />
   <adapter factory="loops.external.NodesLoader" />
diff --git a/resource.py b/resource.py
index 72a7b34..9b9bf87 100644
--- a/resource.py
+++ b/resource.py
@@ -375,8 +375,8 @@ class TextDocumentAdapter(DocumentAdapter):
     """ A type adapter for providing text document functionality for resources.
     """
 
-    implements(IDocument)
-    _contextAttributes = list(IDocument) + list(IBaseResource)
+    implements(ITextDocument)
+    _contextAttributes = list(ITextDocument) + list(IBaseResource)
 
 
 class NoteAdapter(DocumentAdapter):
diff --git a/schema.py b/schema.py
new file mode 100644
index 0000000..1325f25
--- /dev/null
+++ b/schema.py
@@ -0,0 +1,62 @@
+#
+#  Copyright (c) 2005 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
+#  the Free Software Foundation; either version 2 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software
+#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+
+"""
+Specialized schema factories
+
+$Id$
+"""
+
+from zope.component import adapts
+
+from cybertools.composer.schema.factory import SchemaFactory
+from loops.interfaces import IResourceAdapter, IFile, INote
+
+
+class ResourceSchemaFactory(SchemaFactory):
+
+    adapts(IResourceAdapter)
+
+    def __call__(self, interface, **kw):
+        schema = super(ResourceSchemaFactory, self).__call__(interface, **kw)
+        schema.fields.data.height = 10
+        return schema
+
+
+class FileSchemaFactory(SchemaFactory):
+
+    adapts(IFile)
+
+    def __call__(self, interface, **kw):
+        schema = super(FileSchemaFactory, self).__call__(interface, **kw)
+        if 'request' in kw and kw['request'].principal.id != 'rootadmin':
+            del schema.fields['contentType']
+        return schema
+
+
+class NoteSchemaFactory(SchemaFactory):
+
+    adapts(INote)
+
+    def __call__(self, interface, **kw):
+        schema = super(NoteSchemaFactory, self).__call__(interface, **kw)
+        del schema.fields['description']
+        schema.fields.data.height = 5
+        return schema
+
+
diff --git a/tests/setup.py b/tests/setup.py
index d11758d..391d036 100644
--- a/tests/setup.py
+++ b/tests/setup.py
@@ -16,6 +16,7 @@ from zope.app.security.interfaces import IAuthentication
 from zope.dublincore.annotatableadapter import ZDCAnnotatableAdapter
 from zope.dublincore.interfaces import IZopeDublinCore
 
+from cybertools.composer.schema.factory import SchemaFactory
 from cybertools.composer.schema.field import FieldInstance, NumberFieldInstance
 from cybertools.composer.schema.instance import Instance, Editor
 from cybertools.relation.tests import IntIdsStub
@@ -34,6 +35,7 @@ from loops.concept import Concept
 from loops.concept import IndexAttributes as ConceptIndexAttributes
 from loops.resource import Resource, FileAdapter
 from loops.resource import IndexAttributes as ResourceIndexAttributes
+from loops.schema import ResourceSchemaFactory, FileSchemaFactory, NoteSchemaFactory
 from loops.setup import SetupManager, addObject
 from loops.type import LoopsType, ConceptType, ResourceType, TypeConcept
 
@@ -67,6 +69,11 @@ class TestSite(object):
         component.provideAdapter(FieldInstance)
         component.provideAdapter(NumberFieldInstance, name='number')
 
+        component.provideAdapter(SchemaFactory)
+        component.provideAdapter(ResourceSchemaFactory)
+        component.provideAdapter(FileSchemaFactory)
+        component.provideAdapter(NoteSchemaFactory)
+
         component.getSiteManager().registerHandler(invalidateRelations,
                             (ILoopsObject, IObjectRemovedEvent))
         component.getSiteManager().registerHandler(removeRelation,