diff --git a/src/main/clj/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2.clj b/src/main/clj/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2.clj
index 2501732..a4f8ac3 100644
--- a/src/main/clj/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2.clj
+++ b/src/main/clj/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2.clj
@@ -43,13 +43,14 @@
                     :opt-un [::result ::target ::origin ::instrument
                              ::verb])))
 ; "IntransitiveActivity" erbt von Activity, aber ohne ::object
-(s/def ::attributedTo (s/or :object ::Object :link ::Link))
-(s/def ::actor ::attributedTo)
 
 (s/def ::Property (s/or :object ::Object
                         :link ::Link
-                        :objects (s/coll-of ::Object)
-                        :links (s/coll-of ::Link)))
+                        :collection (s/coll-of (s/or :object ::Object :link ::Link))))
+
+(s/def ::attributedTo ::Property)
+(s/def ::actor ::attributedTo)
+
 
 (s/def ::object
   ::Property)