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 0565ff5..f76bfa7 100644
--- a/src/main/clj/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2.clj
+++ b/src/main/clj/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2.clj
@@ -2,11 +2,11 @@
   (:require [clojure.spec.alpha :as s]))
 
 (s/def ::Object (s/or
-                 :uri any?
+                 :uri any? ; TODO: This should only check for uri
                  :map (s/keys
                        :req-un [::id ::type] ;type darf nicht "Link" sein
                        :opt-un [::attributedTo ::und-mehr])))
-(s/def ::id any?)
+(s/def ::id any?) ; TODO: This should only check for uri
 (s/def ::type any?);(fn [s] (s/or (uri? s) (= s "Link"))))
 
 (s/def ::Link (s/keys
@@ -26,6 +26,7 @@
 (s/def ::attributedTo (s/or :object ::Object :link ::Link))
 (s/def ::actor ::attributedTo)
 
+; TODO: Allow sequences
 (s/def ::object (s/or :object ::Object :link ::Link))
 
 (s/def ::result (s/or :object ::Object :link ::Link))