--- a/src/pyams_content/shared/common/__init__.py	Fri Nov 10 12:05:25 2017 +0100
+++ b/src/pyams_content/shared/common/__init__.py	Fri Nov 10 12:05:58 2017 +0100
@@ -18,8 +18,10 @@
 # import interfaces
 from hypatia.interfaces import ICatalog
 from pyams_content.interfaces import IBaseContentInfo
-from pyams_content.interfaces.review import IReviewComments
+from pyams_content.features.checker.interfaces import IContentChecker, MISSING_VALUE, MISSING_LANG_VALUE
+from pyams_content.features.review.interfaces import IReviewComments
 from pyams_content.shared.common.interfaces import IWfSharedContent, IWfSharedContentRoles, ISharedContent, ISharedTool
+from pyams_i18n.interfaces import II18nManager, II18n
 from pyams_security.interfaces import IDefaultProtectionPolicy
 from pyams_sequence.interfaces import ISequentialIdTarget, ISequentialIdInfo
 from pyams_utils.interfaces import VIEW_PERMISSION
@@ -31,6 +33,7 @@
 
 # import packages
 from persistent import Persistent
+from pyams_content.features.checker import BaseContentChecker
 from pyams_i18n.content import I18nManagerMixin
 from pyams_security.property import RolePrincipalsFieldProperty
 from pyams_security.security import ProtectedObject
@@ -174,7 +177,9 @@
     # reset modifiers
     content.modifiers = set()
     # clear review comments
-    IReviewComments(content).clear()
+    comments = IReviewComments(content, None)
+    if comments is not None:
+        comments.clear()
 
 
 @adapter_config(context=IWfSharedContent, provides=ISequentialIdInfo)
@@ -204,6 +209,33 @@
     return query_utility(IWorkflow, name=parent.shared_content_workflow)
 
 
+@adapter_config(name='properties', context=IWfSharedContent, provides=IContentChecker)
+class WfSharedContentChecker(BaseContentChecker):
+    """Default shared content checker"""
+
+    label = _("Properties")
+
+    def inner_check(self, request):
+        output = []
+        translate = request.localizer.translate
+        missing_value = translate(MISSING_VALUE)
+        missing_lang_value = translate(MISSING_LANG_VALUE)
+        i18n = II18n(self.context)
+        langs = II18nManager(self.context).get_languages()
+        for attr in ('title', 'short_name', 'description'):
+            for lang in langs:
+                value = i18n.get_attribute(attr, lang, request)
+                if not value:
+                    if len(langs) == 1:
+                        output.append(missing_value.format(field=translate(IWfSharedContent[attr].title)))
+                    else:
+                        output.append(missing_lang_value.format(field=translate(IWfSharedContent[attr].title),
+                                                                lang=lang))
+        if not self.context.keywords:
+            output.append(missing_value.format(field=translate(IWfSharedContent['keywords'].title)))
+        return output
+
+
 #
 # Main shared content class and adapters
 #