diff --git a/public/ontology/diglib-types.rdf b/public/ontology/diglib-types.rdf
index 806115ee7b860a5754fdd8ee0de0b28e1d3d3742..abef5273596c10edd90d9d6cd8a45c132b5979f8 100644
--- a/public/ontology/diglib-types.rdf
+++ b/public/ontology/diglib-types.rdf
@@ -17,24 +17,4 @@
     <skos:prefLabel>ICONCLASS</skos:prefLabel>
   </rdfs:Datatype>
 
-  <rdfs:Datatype rdf:about="http://uri.hab.de/ontology/diglib-types#VD16">
-    <rdfs:label xml:lang="en">VD16 number</rdfs:label>
-    <rdfs:label xml:lang="de">VD16-Nummer</rdfs:label>
-    <rdfs:seeAlso rdf:resource="https://de.wikipedia.org/wiki/VD_16"/>
-    <skos:prefLabel>VD16</skos:prefLabel>
-  </rdfs:Datatype>
-
-  <rdfs:Datatype rdf:about="http://uri.hab.de/ontology/diglib-types#VD17">
-    <rdfs:label xml:lang="en">VD17 number</rdfs:label>
-    <rdfs:label xml:lang="de">VD17-Nummer</rdfs:label>
-    <rdfs:seeAlso rdf:resource="https://de.wikipedia.org/wiki/VD_17"/>
-    <skos:prefLabel>VD17</skos:prefLabel>
-  </rdfs:Datatype>
-
-  <rdfs:Datatype rdf:about="http://uri.hab.de/ontology/diglib-types#Shelfmark">
-    <rdfs:label xml:lang="en">Shelfmark</rdfs:label>
-    <rdfs:label xml:lang="de">Signatur</rdfs:label>
-    <skos:prefLabel>HAB Wolfenbüttel</skos:prefLabel>
-  </rdfs:Datatype>
-
 </rdf:RDF>