--- a/src/pyams_content/shared/site/__init__.py	Wed Nov 06 16:54:59 2019 +0100
+++ b/src/pyams_content/shared/site/__init__.py	Tue Nov 19 16:39:10 2019 +0100
@@ -10,8 +10,6 @@
 # FOR A PARTICULAR PURPOSE.
 #
 
-__docformat__ = 'restructuredtext'
-
 from zope.interface import implementer, provider
 from zope.schema.fieldproperty import FieldProperty
 
@@ -20,22 +18,28 @@
 from pyams_content.component.theme.interfaces import ITagsTarget, IThemesTarget
 from pyams_content.features.preview.interfaces import IPreviewTarget
 from pyams_content.features.review.interfaces import IReviewTarget
-from pyams_content.shared.common import IWfSharedContentFactory, SharedContent, WfSharedContent, register_content_type
-from pyams_content.shared.site.interfaces import ISiteElementNavigation, ISiteTopic, IWfSiteTopic, IWfSiteTopicFactory, \
-    SITE_TOPIC_CONTENT_NAME, SITE_TOPIC_CONTENT_TYPE
+from pyams_content.shared.common import IWfSharedContentFactory, SharedContent, WfSharedContent, \
+    register_content_type
+from pyams_content.shared.common.types import WfTypedSharedContentMixin
+from pyams_content.shared.site.interfaces import ISiteElementNavigation, ISiteTopic, IWfSiteTopic, \
+    IWfSiteTopicFactory, SITE_TOPIC_CONTENT_NAME, SITE_TOPIC_CONTENT_TYPE
 from pyams_utils.adapter import adapter_config
 from pyams_workflow.interfaces import IWorkflow, IWorkflowState, IWorkflowVersions
 
 
+__docformat__ = 'restructuredtext'
+
+
 @implementer(IWfSiteTopic, IIllustrationTarget, ILinkIllustrationTarget, IParagraphContainerTarget,
              ITagsTarget, IThemesTarget, IPreviewTarget, IReviewTarget)
-class WfSiteTopic(WfSharedContent):
+class WfSiteTopic(WfSharedContent, WfTypedSharedContentMixin):
     """Base site topic"""
 
     content_type = SITE_TOPIC_CONTENT_TYPE
     content_name = SITE_TOPIC_CONTENT_NAME
 
     references = FieldProperty(IWfSiteTopic['references'])
+    data_type = FieldProperty(IWfSiteTopic['data_type'])
 
 register_content_type(WfSiteTopic)