diff --git a/doc/Translate_ttl_to_spec.md b/doc/Translate_ttl_to_spec.md
index 4512cd1..dc8dc54 100644
--- a/doc/Translate_ttl_to_spec.md
+++ b/doc/Translate_ttl_to_spec.md
@@ -4,12 +4,12 @@
   - [**rdfs:domain**](#rdfsdomain)
     - [owner is **a** type](#owner-is-a-type)
     - [owner is a **owl:unionOf** types](#owner-is-a-owlunionof-types)
+  - [**rdfs:subClassOf**](#rdfssubclassof)
 - [Further infos](#further-infos)
   - [RDF/S](#rdfs)
     - [range (https://www.w3.org/TR/rdf12-schema/#ch\_range)](#range-httpswwww3orgtrrdf12-schemach_range)
     - [type (https://www.w3.org/TR/rdf12-schema/#ch\_type)](#type-httpswwww3orgtrrdf12-schemach_type)
 
-
 # receipts to transform ttl to spec
 
 ## **a**
@@ -25,13 +25,10 @@ as:id a owl:DatatypeProperty ,
 
 Maps to
 ```clojure
-(s/def ::DatatypeProperty any?)
-(s/def ::FunctionalProperty any?)
-
 (s/def ::id 
     (s/and 
-        ::DeprecatedProperty 
-        ::FunctionalProperty))
+        ::owl/DeprecatedProperty 
+        ::owl/FunctionalProperty))
 ```
 
 Der token `a` in einer ttl Definition entspricht dem RDF-Prädikat `rdf:type`. Siehe:
@@ -54,12 +51,10 @@ as:id rdfs:range xsd:anyURI ;
 
 Maps to
 ```clojure
-(s/def ::anyURI p/uri-string?)
-
 (s/def ::id 
     (s/and 
         ...
-        ::anyURI))
+        ::xsd/anyURI))
 ```
 
 ## **rdfs:domain**
@@ -68,7 +63,7 @@ Maps to
 
 ### owner is **a** type
 
-It is added to the owner. That's the way to model properties. If the owner is membe of an other namespace, we create a subclass with same name in the namespce in scope and enhance the subclass.
+We ignore this.
 
 Example in namespace activitypub2
 ```ttl
@@ -77,10 +72,6 @@ as:id rdfs:domain [a owl:Class;]
 
 Maps to
 ```clojure
-(s/def
-  ::Class
-  (s/merge ::owl/Class
-           (s/keys :opt-un [::id])))
 ```
 
 ### owner is a **owl:unionOf** types
@@ -94,12 +85,35 @@ as:id rdfs:domain [owl:unionOf (as:Link as:Object)]
 
 Maps to
 ```clojure
-(s/def ::Object (s/keys :opt-un [::id ...]))
+(s/def ::Object (sh/map-spec (s/keys :opt-un [::id ...])))
 
 
-(s/def ::Link (s/keys :opt-un [::id]))
+(s/def ::Link (sh/map-spec (s/keys :opt-un [::id])))
 ```
 
+## **rdfs:subClassOf**
+
+*its* value a **rdfs:subClassOf** *the class*
+
+If subClassOf links to an other definition we map range same as **a**.
+
+Example:
+```ttl
+as:Activity rdfs:subClassOf as:Object ;
+```
+
+Maps to
+```clojure
+(s/def ::Object ...)
+
+(s/def ::Activity
+    (s/and 
+        ...
+        ::Object
+        ...))
+```
+
+
 # Further infos
 
 ## RDF/S
diff --git a/doc/id_ttl_to_rdf.md b/doc/id_ttl_to_rdf.md
new file mode 100644
index 0000000..d771931
--- /dev/null
+++ b/doc/id_ttl_to_rdf.md
@@ -0,0 +1,32 @@
+```ttl
+as:id a owl:DatatypeProperty ,
+        owl:FunctionalProperty,
+        owl:DeprecatedProperty ;
+  rdfs:label "id"@en ;
+  rdfs:range xsd:anyURI ;
+  rdfs:domain [
+    a owl:Class ;
+    owl:unionOf (as:Link as:Object)
+  ] .
+```
+
+This ttl def can be written as rdf N-Triples:
+
+```
+as:id rdf:type owl:DatatypeProperty .
+as:id rdf:type owl:FunctionalProperty .
+as:id rdf:type owl:DeprecatedProperty .
+
+as:id rdfs:label "id"@en .
+
+as:id rdfs:range xsd:anyURI .
+
+as:id rdfs:domain _:do .
+_:do rdf:type owl:Class .
+_:do owl:unionOf (as:Link as:Object) .
+
+---
+
+_:Object as:id "http://an.uri"
+_:Object as:type _:do
+```
\ No newline at end of file
diff --git a/src/main/clj/org/domaindrivenarchitecture/activity_pub_poc/common.clj b/src/main/clj/org/domaindrivenarchitecture/activity_pub_poc/common.clj
index baa9523..f0260c6 100644
--- a/src/main/clj/org/domaindrivenarchitecture/activity_pub_poc/common.clj
+++ b/src/main/clj/org/domaindrivenarchitecture/activity_pub_poc/common.clj
@@ -2,6 +2,6 @@
 
 (def resource-path "src/main/resources/")
 
-(def activitystreams-ttl (str resource-path "activitystreams_2.0_owl.ttl"))
+(def activitystreams-ttl (str resource-path "activitystreams_2.0.ttl"))
 (def rdf-schema-ttl (str resource-path "rdf_schema_1.1.ttl"))
 (def rdf-syntax-ttl (str resource-path "rdf_syntax_ns_22.ttl"))
\ No newline at end of file
diff --git a/src/main/clj/org/domaindrivenarchitecture/activity_pub_poc/xsd.clj b/src/main/clj/org/domaindrivenarchitecture/activity_pub_poc/xsd.clj
deleted file mode 100644
index abbad0e..0000000
--- a/src/main/clj/org/domaindrivenarchitecture/activity_pub_poc/xsd.clj
+++ /dev/null
@@ -1,7 +0,0 @@
-(ns org.domaindrivenarchitecture.activity-pub-poc.xsd
-  (:require [clojure.spec.alpha :as s]))
-
-; http://www.datypic.com/sc/xsd/t-xsd_anyURI.html
-; TODO: Find out correct definition!
-(defn anyUri? [input]
-  false)
\ No newline at end of file
diff --git a/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2.cljc b/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2.cljc
index 093e800..0be62e1 100644
--- a/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2.cljc
+++ b/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2.cljc
@@ -1,59 +1,91 @@
 (ns org.domaindrivenarchitecture.activity-pub-poc.activitystreams2
   (:require [clojure.spec.alpha :as s]
             [orchestra.core :refer [defn-spec]]
+            [org.domaindrivenarchitecture.activity-pub-poc.spec-helper :as sh]
             [org.domaindrivenarchitecture.activity-pub-poc.owl :as owl]
             [org.domaindrivenarchitecture.activity-pub-poc.xsd :as xsd]))
 
-(defn-spec 
-  is-functional-property? boolean?
-  "Checks whether spec is a FunctionalProperty."
-  [spec keyword?]
-  (some #(clojure.string/includes? % "FunctionalProperty") (s/describe spec)))
 
-;http://www.w3.org/ns/activitystreams#id
-(s/def
-  ::id (s/and ::owl/DatatypeProperty
-              ::owl/FunctionalProperty
-              ::owl/DeprecatedProperty
-              ::xsd/anyURI))
+
+;=======================
+
+;http://www.w3.org/ns/activitystreams#Object
+;TODO: definition in progress
+(s/def ::Object
+  (s/and
+   ::owl/Class
+   (sh/map-spec (s/keys :opt-un [::id ::type ::attachment]))))
+
+;http://www.w3.org/ns/activitystreams#Link
+;TODO: definition in progress
+(s/def ::Link 
+  (s/and
+   ::owl/Class
+   (sh/map-spec (s/keys :opt-un [::id ::type]))))
+
+;http://www.w3.org/ns/activitystreams#Activity
+;TODO: Define more properties necessary for Like
+(s/def ::Activity 
+  (s/and
+   ::owl/Class
+   ::Object
+   (sh/map-spec (s/keys :opt-un [::result ::object ::actor]))))
+
+;http://www.w3.org/ns/activitystreams#Relationship
+;We only have this class, since the property "object" is in the domain "Activity" and "Relationship"
+; TODO: What means: "as:Relationship a rdf:Statement". Relevant for spec?
+(s/def ::Relationship
+  (s/and
+   ::owl/Class
+   ::Object
+   (sh/map-spec (s/keys :opt-un [::object]))))
+
+;http://www.w3.org/ns/activitystreams#Like
+(s/def ::Like
+  (s/and
+   ::owl/Class
+   ::Activity))
 
 ;http://www.w3.org/ns/activitystreams#attachment
-(s/def ::attachment 
+(s/def ::attachment
   (s/and 
    ::owl/ObjectProperty
-   ::Class
-   ::Link
-   ::Object))
+   ::owl/Class
+   ::Object
+   ::Link))
+
+;http://www.w3.org/ns/activitystreams#id
+(s/def ::id
+  (s/and ::owl/DatatypeProperty
+         ::owl/FunctionalProperty
+         ::owl/DeprecatedProperty
+         ::xsd/anyURI))
+
+;https://www.w3.org/TR/activitystreams-vocabulary/#dfn-type
+;TODO: this can not be found in the ttl / namespace. Where is this exactly defined?
+(s/def ::type
+  any?;::xsd/anyURI
+  )
 
 ;http://www.w3.org/ns/activitystreams#result
 (s/def ::result 
   (s/and 
    ::owl/ObjectProperty
-   ::Class
    ::Object
    ::Link))
 
-;http://www.w3.org/ns/activitystreams#Activity
-;TODO: definition in progress
-(s/def ::Activity 
-  (s/and ::Object
-         (s/keys :opt-un [::result])))
+;http://www.w3.org/ns/activitystreams#object
+(s/def ::object 
+  (s/and
+   ::owl/ObjectProperty
+   ::owl/Class
+   ::Object
+   ::Link))
 
-;http://www.w3.org/ns/activitystreams#Object
-;TODO: definition in progress
-(s/def ::Object (s/keys :opt-un [::id ::attachment]))
-
-
-;http://www.w3.org/ns/activitystreams#Link
-;TODO: definition in progress
-(s/def ::Link (s/keys :opt-un [::id]))
-
-;TODO: There is no as:Class! Why do we need this?
-(s/def
-  ::Class
-  (s/merge ::owl/Class
-           (s/keys :opt-un [::id])))
-
-
-;http://www.w3.org/ns/activitystreams#Like
-(s/def ::Like ::Activity)
\ No newline at end of file
+;http://www.w3.org/ns/activitystreams#actor
+(s/def ::actor 
+  (s/and
+   ::owl/ObjectProperty
+   ::owl/Class
+   ::Object
+   ::Link))
diff --git a/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/owl.cljc b/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/owl.cljc
index 7e0ccf6..86fce47 100644
--- a/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/owl.cljc
+++ b/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/owl.cljc
@@ -3,6 +3,7 @@
    is realized in deep implemented."
   (:require
    [clojure.spec.alpha :as s]
+   [org.domaindrivenarchitecture.activity-pub-poc.predicates :as p]
    [orchestra.core :refer [defn-spec]]))
 
 ; Properties:https://www.w3.org/TR/owl-ref/#Property
@@ -11,7 +12,11 @@
 
 ;http://www.w3.org/2002/07/owl#Class
 ;https://www.w3.org/TR/owl-ref/#Class-def
-(s/def ::Class any?)
+(defn-spec owl-class? boolean?
+  [elem any?]
+  (or (p/uri-string? elem)
+      (coll? elem)))
+(s/def ::Class owl-class?)
 
 ;http://www.w3.org/2002/07/owl#DatatypeProperty
 (s/def ::DatatypeProperty any?)
diff --git a/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/spec_helper.cljc b/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/spec_helper.cljc
new file mode 100644
index 0000000..cada86f
--- /dev/null
+++ b/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/spec_helper.cljc
@@ -0,0 +1,20 @@
+(ns org.domaindrivenarchitecture.activity-pub-poc.spec-helper
+  "A swallow spec translation implementation of owl. Inheritance of FunctionalProperty 
+   is realized in deep implemented."
+  (:require
+   [clojure.spec.alpha :as s]
+   [orchestra.core :refer [defn-spec]]))
+
+(defn-spec map-spec s/spec?
+  "Spec that applies only for map values."
+  [spec s/spec?]
+  (s/and
+   (s/or
+    :no-map #(not (map? %))
+    :map spec)))
+
+(defn-spec
+  is-functional-property? boolean?
+  "Checks whether spec is a FunctionalProperty."
+  [spec s/spec?]
+  (some #(clojure.string/includes? % "FunctionalProperty") (s/describe spec)))
\ No newline at end of file
diff --git a/src/main/resources/activitystreams_2.0_owl.ttl b/src/main/resources/activitystreams_2.0.ttl
similarity index 100%
rename from src/main/resources/activitystreams_2.0_owl.ttl
rename to src/main/resources/activitystreams_2.0.ttl
diff --git a/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2_test.clj b/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2_test.clj
deleted file mode 100644
index c9109ac..0000000
--- a/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2_test.clj
+++ /dev/null
@@ -1,31 +0,0 @@
-(ns org.domaindrivenarchitecture.activity-pub-poc.activitystreams2-test
-  (:require
-   [clojure.test :refer [deftest is are testing run-tests]]
-   [clojure.spec.test.alpha :as st]
-   [clojure.spec.alpha :as s]
-   [org.domaindrivenarchitecture.activity-pub-poc.activitystreams2 :as sut]))
-
-(deftest shoult-test-spec-for-having-functional-property
-  (is (sut/is-functional-property? ::sut/id))
-  (is (not (sut/is-functional-property? ::sut/Like))))
-
-(deftest id-test
-  (is (s/valid? ::sut/id "https://social.bla/alyssa/status/RANDOMHASH"))
-  (is (not (s/valid? ::sut/id nil)))
-  (is (not (s/valid? ::sut/id 2)))
-  (is (not (s/valid? ::sut/id "no-uri")))
-  (is (not (s/valid? ::sut/id ["https://social.bla/alyssa/status/RANDOMHASH", "https://social.bla/alyssa/status/RANDOMHASH2"])))
-  )
-
-(deftest result-test
-  (is (s/valid? ::sut/result "https://social.bla/alyssa/result/RANDOMHASH"))
-  (is (s/valid? ::sut/result {:type "http://www.types.example/flightstatus", :name "On Time"}))
-  (is (s/valid? ::sut/result {:type "Link" :href "http://www.target.de"}))
-  (is (not (s/valid? ::sut/result nil)))
-  (is (not (s/valid? ::sut/result 47)))
-)
-
-
-;(deftest attachment-test
-;  (is (s/valid? ::sut/attachment))
-;  )
\ No newline at end of file
diff --git a/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2_test.cljc b/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2_test.cljc
new file mode 100644
index 0000000..9735f68
--- /dev/null
+++ b/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2_test.cljc
@@ -0,0 +1,63 @@
+(ns org.domaindrivenarchitecture.activity-pub-poc.activitystreams2-test
+  (:require
+   [clojure.test :refer [deftest is are testing run-tests]]
+   [clojure.spec.test.alpha :as st]
+   [clojure.spec.alpha :as s]
+   [org.domaindrivenarchitecture.activity-pub-poc.activitystreams2 :as sut]))
+
+(deftest id-test
+  (is (s/valid? ::sut/id "https://social.bla/alyssa/status/RANDOMHASH"))
+  (is (not (s/valid? ::sut/id nil)))
+  (is (not (s/valid? ::sut/id 2)))
+  (is (not (s/valid? ::sut/id "no-uri")))
+  (is (not (s/valid? ::sut/id ["https://social.bla/alyssa/status/RANDOMHASH", "https://social.bla/alyssa/status/RANDOMHASH2"]))))
+
+(deftest object-test
+  (is (s/valid? ::sut/object "http://example.org/posts/1"))
+  (is (s/valid? ::sut/object {:type "Note",
+                              :content "A simple note"}))
+  (is (s/valid? ::sut/object ["http://example.org/posts/1",
+                              {:type "Note",
+                               :summary "A simple note",
+                               :content "That is a tree."}])))
+
+(deftest result-test
+  (is (s/valid? ::sut/result "https://social.bla/alyssa/result/RANDOMHASH"))
+  (is (s/valid? ::sut/result {:type "http://www.types.example/flightstatus", :name "On Time"}))
+  (is (s/valid? ::sut/result {:type "Link" :href "http://www.target.de"}))
+  (is (not (s/valid? ::sut/result nil)))
+  (is (not (s/valid? ::sut/result 47))))
+
+
+(deftest attachment-test
+  (is (s/valid? ::sut/attachment
+                [{:type "Image",
+                  :content "This is what he looks like.",
+                  :url "http://example.org/cat.jpeg"}])))
+
+(deftest actor-test
+  (is (s/valid? ::sut/actor "http://sally.example.org"))
+  (is (s/valid? ::sut/actor {:type "Person",
+                             :id "http://sally.example.org",
+                             :summary "Sally"}))
+  (is (s/valid? ::sut/actor ["http://joe.example.org",
+                             {:type "Person",
+                              :id "http://sally.example.org",
+                              :name "Sally"}])))
+
+(deftest Activity-test
+  (is (s/valid? ::sut/Activity
+                {:type "Activity",
+                 :summary "Sally did something to a note",
+                 :actor {:type "Person",
+                         :name "Sally"},
+                 :object {:type "Note",
+                          :name "A Note"}})))
+
+(deftest Like-test
+  (is (s/valid? ::sut/Like 
+                {:summary "Sally liked a note",
+                 :type "Like",
+                 :actor {:type "Person",
+                         :name "Sally"},
+                 :object "http://example.org/notes/1"})))
diff --git a/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/owl_test.cljc b/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/owl_test.cljc
index 427751f..4bc968f 100644
--- a/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/owl_test.cljc
+++ b/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/owl_test.cljc
@@ -11,4 +11,15 @@
   (is (sut/functional? ["str"]))
   (is (not (sut/functional? [])))
   (is (not (sut/functional? nil)))
-  (is (not (sut/functional? [1 2]))))
\ No newline at end of file
+  (is (not (sut/functional? [1 2]))))
+
+(deftest owl-class-predicate
+  (is (sut/owl-class? "http://some.uri"))
+  (is (sut/owl-class? {:as "class-definition"}))
+  (is (sut/owl-class? []))
+  (is (not (sut/owl-class? "str")))
+  (is (not (sut/owl-class? nil))))
+
+(deftest class-test
+  (is (s/valid? ::sut/Class "https://social.bla/alyssa/status/RANDOMHASH"))
+  (is (s/valid? ::sut/Class {})))
diff --git a/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/spec_helper_test.cljc b/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/spec_helper_test.cljc
new file mode 100644
index 0000000..cb7f08a
--- /dev/null
+++ b/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/spec_helper_test.cljc
@@ -0,0 +1,11 @@
+(ns org.domaindrivenarchitecture.activity-pub-poc.spec-helper-test
+  (:require
+   [clojure.test :refer [deftest is are testing run-tests]]
+   [clojure.spec.test.alpha :as st]
+   [clojure.spec.alpha :as s]
+   [org.domaindrivenarchitecture.activity-pub-poc.activitystreams2 :as as2]
+   [org.domaindrivenarchitecture.activity-pub-poc.spec-helper :as sut]))
+
+(deftest shoult-test-spec-for-having-functional-property
+  (is (sut/is-functional-property? ::as2/id))
+  (is (not (sut/is-functional-property? ::as2/Like))))
\ No newline at end of file