diff --git a/external/base.py b/external/base.py
index 498ce8f..52faf7f 100644
--- a/external/base.py
+++ b/external/base.py
@@ -194,9 +194,6 @@ class Extractor(Base):
                     element = self.getDeassignmentElement(obj, child, pred)
                 if element is not None:
                     yield element
-        # TODO: include new parent and child relations
-        # TODO: include statements for removal of relations if necessary
-        #       (or remove relations not in import file upon import)
         # TODO: include children and resources if corresponding flags are set.
 
     def extractForParents(self, parents, predicates=None,
diff --git a/organize/job/base.py b/organize/job/base.py
index 1737694..09d2371 100644
--- a/organize/job/base.py
+++ b/organize/job/base.py
@@ -37,4 +37,4 @@ class JobManager(object):
         self.context = context
 
     def process(self):
-        raise NotImplementedError("Method 'process' has to be implementd by subclass.")
+        raise NotImplementedError("Method 'process' has to be implemented by subclass.")
diff --git a/system/README.txt b/system/README.txt
index 3bc1aae..ab90402 100644
--- a/system/README.txt
+++ b/system/README.txt
@@ -42,6 +42,9 @@ In addition to the application site we need a loops system management site.
   [u'domain', u'file', u'hasType', u'job', u'note', u'predicate',
    u'standard', u'textdocument', u'type']
 
+  >>> list(systemRoot.getRecordManager().keys())
+  [u'jobs']
+
 
 Agents and Jobs
 ===============
diff --git a/system/browser.py b/system/browser.py
new file mode 100644
index 0000000..f00c9a1
--- /dev/null
+++ b/system/browser.py
@@ -0,0 +1,42 @@
+#
+#  Copyright (c) 2010 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
+#
+
+"""
+Views for loops system management.
+
+$Id$
+"""
+
+from cybertools.tracking.btree import TrackingStorage
+from loops.system.job import JobRecord
+
+
+class SetupActions(object):
+    """ Collection of methods for manually setting up  system objects
+        within a loops site.
+    """
+
+    def __init__(self, context, request):
+        self.context = context
+        self.request = request
+
+    def setupJobRecords(self):
+        records = self.context.getRecordManager()
+        if 'jobs' not in records:
+            records['jobs'] = TrackingStorage(trackFactory=JobRecord)
+        return 'Done'
diff --git a/system/configure.zcml b/system/configure.zcml
index 2441ce6..bc2c008 100644
--- a/system/configure.zcml
+++ b/system/configure.zcml
@@ -3,11 +3,19 @@
 <configure
    xmlns:zope="http://namespaces.zope.org/zope"
    xmlns:browser="http://namespaces.zope.org/browser"
-   i18n_domain="zope">
+   i18n_domain="loops">
 
-  <zope:adapter factory="loops.system.setup.SetupManager"
-                name="system" />
+  <!--<zope:adapter factory="loops.system.setup.SetupManager"
+                name="system" />-->
+
+  <browser:page
+      name="setup_jobrecords.html"
+      for="loops.interfaces.ILoops"
+      class="loops.system.browser.SetupActions"
+      attribute="setupJobRecords"
+      permission="loops.ManageSite" />
 
   <include package=".site" />
+  <include package=".sync" />
 
 </configure>
diff --git a/system/interfaces.py b/system/interfaces.py
index bb16900..db4a2c9 100644
--- a/system/interfaces.py
+++ b/system/interfaces.py
@@ -25,10 +25,23 @@ $Id$
 from zope.interface import Interface, Attribute
 from zope import interface, component, schema
 
+from cybertools.tracking.interfaces import ITrack
 from loops.interfaces import IConceptSchema
 from loops.util import _
 
 
+class IJobRecords(Interface):
+
+    pass
+
+
+class IJobRecord(ITrack):
+
+    pass
+
+
+# agent-based job control - not used at the moment.
+
 class IJob(IConceptSchema):
     """ Specifies/represents a job to be executed by a cybertools.agent
         instance.
@@ -43,7 +56,8 @@ class IJob(IConceptSchema):
                     title=_(u'Agent Identifier'),
                     description=_(u'The identifier of the agent that will '
                         'execute the job; this identifies also the type '
-                        'of job, e.g. a crawling or transport job.')
+                        'of job, e.g. a crawling or transport job.'),
+                    required=False,)
     startTime = schema.Date(
                     title=_(u'Start Date/Time'),
                     description=_(u'Date/time at which the job should be '
@@ -63,3 +77,4 @@ class IJobManager(IConceptSchema):
     """ A container/manager for jobs to be executed by a cybertools.agent
         instance.
     """
+
diff --git a/system/job.py b/system/job.py
new file mode 100644
index 0000000..29c2a53
--- /dev/null
+++ b/system/job.py
@@ -0,0 +1,51 @@
+#
+#  Copyright (c) 2010 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
+#
+
+"""
+Recording changes to loops objects.
+
+$Id$
+"""
+
+from zope.interface import implements
+from zope.cachedescriptors.property import Lazy
+from zope.component import adapter
+
+from cybertools.meta.interfaces import IOptions
+from cybertools.tracking.btree import Track, getTimeStamp
+from loops.organize.tracking.base import BaseRecordManager
+from loops.system.interfaces import IJobRecord, IJobRecords
+from loops import util
+
+
+class JobRecords(BaseRecordManager):
+
+    implements(IJobRecords)
+
+    storageName = 'jobs'
+
+    def __init__(self, context):
+        self.context = context
+
+
+class JobRecord(Track):
+
+    implements(IJobRecord)
+
+    typeName = 'JobRecord'
+
diff --git a/system/setup.py b/system/setup.py
index 8da391e..8518157 100644
--- a/system/setup.py
+++ b/system/setup.py
@@ -1,5 +1,5 @@
 #
-#  Copyright (c) 2008 Helmut Merz helmutm@cy55.de
+#  Copyright (c) 2010 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
@@ -25,9 +25,11 @@ $Id$
 from zope.component import adapts
 from zope.interface import implements, Interface
 
+from cybertools.tracking.btree import TrackingStorage
 from loops.concept import Concept
 from loops.interfaces import ITypeConcept
 from loops.setup import SetupManager as BaseSetupManager
+from loops.system.job import JobRecord
 
 
 class SetupManager(BaseSetupManager):
@@ -39,4 +41,8 @@ class SetupManager(BaseSetupManager):
         # type concepts:
         job = self.addAndConfigureObject(concepts, Concept, 'job', title=u'Job',
                         conceptType=type)
+        # job records:
+        records = self.context.getRecordManager()
+        if 'jobs' not in records:
+            records['jobs'] = TrackingStorage(trackFactory=JobRecord)
 
diff --git a/system/sync/README.txt b/system/sync/README.txt
new file mode 100644
index 0000000..e237ea8
--- /dev/null
+++ b/system/sync/README.txt
@@ -0,0 +1,32 @@
+===============================================================
+loops - Linked Objects for Organization and Processing Services
+===============================================================
+
+  ($Id$)
+
+  >>> from zope import component
+  >>> from zope.traversing.api import getName
+
+Let's set up a loops site with basic and example concepts and resources.
+
+  >>> from zope.app.testing.setup import placefulSetUp, placefulTearDown
+  >>> site = placefulSetUp(True)
+
+  >>> from loops.expert.testsetup import TestSite
+  >>> t = TestSite(site)
+  >>> concepts, resources, views = t.setup()
+  >>> loopsRoot = site['loops']
+  >>> len(concepts), len(resources), len(views)
+  (30, 3, 1)
+
+
+Synchronize: Transfer Changes from one loops Site to Another
+============================================================
+
+  >>> from loops.system.sync.browser import SyncChanges
+
+
+Fin de Partie
+=============
+
+  >>> placefulTearDown()
diff --git a/system/sync/__init__.py b/system/sync/__init__.py
new file mode 100644
index 0000000..38314f3
--- /dev/null
+++ b/system/sync/__init__.py
@@ -0,0 +1,3 @@
+"""
+$Id$
+"""
diff --git a/system/sync/browser.py b/system/sync/browser.py
new file mode 100644
index 0000000..7027143
--- /dev/null
+++ b/system/sync/browser.py
@@ -0,0 +1,49 @@
+#
+#  Copyright (c) 2010 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
+#
+
+"""
+view class(es) for import/export.
+
+$Id$
+"""
+
+from cStringIO import StringIO
+import os
+import time
+from zope import component
+from zope.interface import Interface, implements
+from zope.app.pagetemplate.viewpagetemplatefile import ViewPageTemplateFile
+from zope.cachedescriptors.property import Lazy
+from zope.traversing.api import getName, getPath
+
+from loops.organize.tracking.report import RecentChanges
+from loops import util
+
+
+control_macros = ViewPageTemplateFile('control.pt')
+
+
+class SyncChanges(RecentChanges):
+    """ View for controlling the transfer of changes from a loops site
+        to another one.
+    """
+
+    @Lazy
+    def macro(self):
+        return control_macros.macros['main']
+
diff --git a/system/sync/configure.zcml b/system/sync/configure.zcml
new file mode 100644
index 0000000..f7bfc44
--- /dev/null
+++ b/system/sync/configure.zcml
@@ -0,0 +1,16 @@
+<!-- $Id$ -->
+
+<configure
+   xmlns:zope="http://namespaces.zope.org/zope"
+   xmlns:browser="http://namespaces.zope.org/browser"
+   i18n_domain="loops">
+
+  <!-- views -->
+
+  <browser:page
+      name="sync_changes.html"
+      for="loops.interfaces.IConcept"
+      class="loops.system.sync.browser.SyncChanges"
+      permission="zope.ManageContent" />
+
+</configure>
diff --git a/system/sync/control.pt b/system/sync/control.pt
new file mode 100644
index 0000000..abd22d4
--- /dev/null
+++ b/system/sync/control.pt
@@ -0,0 +1,10 @@
+<!-- $Id$ -->
+
+
+<metal:main define-macro="main"
+              tal:define="info item/getData">
+  <metal:title use-macro="item/conceptMacros/concepttitle" />
+  <br />
+  <metal:listing use-macro="info/macro" />
+  <input type="submit" value="Synchronize Changes" />
+</metal:main>
diff --git a/system/sync/tests.py b/system/sync/tests.py
new file mode 100755
index 0000000..e294ff6
--- /dev/null
+++ b/system/sync/tests.py
@@ -0,0 +1,27 @@
+# $Id$
+
+import unittest, doctest
+import os
+from zope.testing.doctestunit import DocFileSuite
+from zope.interface.verify import verifyClass
+
+
+dataDirectory = os.path.join(os.path.dirname(__file__), 'testdata')
+
+
+class Test(unittest.TestCase):
+    "Basic tests for the loops.system.sync package."
+
+    def testSomething(self):
+        pass
+
+
+def test_suite():
+    flags = doctest.NORMALIZE_WHITESPACE | doctest.ELLIPSIS
+    return unittest.TestSuite((
+                unittest.makeSuite(Test),
+                DocFileSuite('README.txt', optionflags=flags),
+            ))
+
+if __name__ == '__main__':
+    unittest.main(defaultTest='test_suite')