diff --git a/doc/Translate_ttl_to_spec.md b/doc/Translate_ttl_to_spec.md
index 0e1c86b..4512cd1 100644
--- a/doc/Translate_ttl_to_spec.md
+++ b/doc/Translate_ttl_to_spec.md
@@ -1,6 +1,18 @@
+- [receipts to transform ttl to spec](#receipts-to-transform-ttl-to-spec)
+  - [**a**](#a)
+  - [**rdfs:range**](#rdfsrange)
+  - [**rdfs:domain**](#rdfsdomain)
+    - [owner is **a** type](#owner-is-a-type)
+    - [owner is a **owl:unionOf** types](#owner-is-a-owlunionof-types)
+- [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
 
-## *it* **a** *something*
+## **a**
 
 *it* is **a** *something*
 
@@ -28,6 +40,66 @@ Der token `a` in einer ttl Definition entspricht dem RDF-Prädikat `rdf:type`. S
 
 Das bedeutet für das Tripel: `(R, rdf:type, C) => C instanceof rdfs:Class & R instanceof C`
 
+
+## **rdfs:range**
+
+*its* value is defined in a **rdfs:range** *the range*
+
+If range links to an other definition we map range same as **a**.
+
+Example:
+```ttl
+as:id rdfs:range xsd:anyURI ;
+```
+
+Maps to
+```clojure
+(s/def ::anyURI p/uri-string?)
+
+(s/def ::id 
+    (s/and 
+        ...
+        ::anyURI))
+```
+
+## **rdfs:domain**
+
+*it* belong to a **rdfs:domain** *owner*
+
+### 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.
+
+Example in namespace activitypub2
+```ttl
+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
+
+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.
+
+Example in namespace activitypub2
+```ttl
+as:id rdfs:domain [owl:unionOf (as:Link as:Object)]
+```
+
+Maps to
+```clojure
+(s/def ::Object (s/keys :opt-un [::id ...]))
+
+
+(s/def ::Link (s/keys :opt-un [::id]))
+```
+
 # Further infos
 
 ## RDF/S
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 a4bffa9..3540fc0 100644
--- a/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2.cljc
+++ b/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2.cljc
@@ -18,25 +18,43 @@
               ::xsd/anyURI))
 
 ;http://www.w3.org/ns/activitystreams#attachment
-;TODO: definition in progress
 (s/def ::attachment 
-  (s/and ::owl/ObjectProperty))
+  (s/and 
+   ::Class
+   ::Link
+   ::Object
+   ::owl/ObjectProperty))
 
 ;http://www.w3.org/ns/activitystreams#result
 ;TODO: definition in progress
+;How should we translate this?
+;rdfs:range [
+;    a owl:Class ;
+;    owl:unionOf ( as:Object as:Link )
+;  ]
 (s/def ::result 
   (s/and ::owl/ObjectProperty))
 
-;http://www.w3.org/ns/activitystreams#Object
-;TODO: definition in progress
-(s/def ::Object (s/keys :opt-un [::attachment]))
-
 ;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#Like
-(s/def ::Like ::Activity)
+;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]))
+
+(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
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 7afe811..7e0ccf6 100644
--- a/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/owl.cljc
+++ b/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/owl.cljc
@@ -9,6 +9,10 @@
 ; * Datatype properties link individuals to data values.
 ; * Object properties link individuals to individuals.
 
+;http://www.w3.org/2002/07/owl#Class
+;https://www.w3.org/TR/owl-ref/#Class-def
+(s/def ::Class any?)
+
 ;http://www.w3.org/2002/07/owl#DatatypeProperty
 (s/def ::DatatypeProperty any?)
 
diff --git a/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/xsd.cljc b/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/xsd.cljc
index 2fecabf..578afab 100644
--- a/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/xsd.cljc
+++ b/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/xsd.cljc
@@ -1,6 +1,5 @@
 (ns org.domaindrivenarchitecture.activity-pub-poc.xsd
-  "A swallow spec translation implementation of xsd Inheritance of FunctionalProperty 
-     is realized in deep implemented."
+  "A spec translation implementation of xsd. Predicates are implemented fully functional."
   (:require [clojure.spec.alpha :as s]
             [org.domaindrivenarchitecture.activity-pub-poc.predicates :as p]))