diff --git a/OKH-LOSH.ttl b/OKH-LOSH.ttl
index 5b452011..a8cf1867 100644
--- a/OKH-LOSH.ttl
+++ b/OKH-LOSH.ttl
@@ -1,4 +1,4 @@
-@base             <https://w3id.org/oseg/ont/osh/okh> .
+@base             <https://w3id.org/oseg/ont/okh> .
 @prefix okh:      <#> .
 @prefix obo:      <http://purl.obolibrary.org/obo/> .
 @prefix owl:      <http://www.w3.org/2002/07/owl#> .
@@ -11,8 +11,8 @@
 @prefix dcterms:  <http://purl.org/dc/terms/> .
 @prefix epo:      <http://data.epo.org/linked-data/def/patent/> .
 @prefix npg:      <http://ns.nature.com/terms/> .
-@prefix otrl:     <https://w3id.org/oseg/ont/osh/otrl#> .
-@prefix tsdc:     <https://w3id.org/oseg/ont/osh/tsdc/core#> .
+@prefix otrl:     <https://w3id.org/oseg/ont/otrl#> .
+@prefix tsdc:     <https://w3id.org/oseg/ont/tsdc/core#> .
 
 # SPDX-FileCopyrightText: 2020 - 2021 Martin Häuer <martin.haeuer@ose-germany.de>
 # SPDX-FileCopyrightText: 2020 - 2022 Robin Vobruba <hoijui.quaero@gmail.com>
diff --git a/OTRL.ttl b/OTRL.ttl
index 6925984a..4255f5fe 100644
--- a/OTRL.ttl
+++ b/OTRL.ttl
@@ -1,4 +1,4 @@
-@base             <https://w3id.org/oseg/ont/osh/otrl> .
+@base             <https://w3id.org/oseg/ont/otrl> .
 @prefix otrl:     <#> .
 @prefix owl:      <http://www.w3.org/2002/07/owl#> .
 @prefix rdf:      <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
diff --git a/sample_data/okh-sample-LOSH-Dummy-A.ttl b/sample_data/okh-sample-LOSH-Dummy-A.ttl
index e4acd3b4..45e5f52c 100644
--- a/sample_data/okh-sample-LOSH-Dummy-A.ttl
+++ b/sample_data/okh-sample-LOSH-Dummy-A.ttl
@@ -5,7 +5,7 @@
 
 @base             <https://github.com/OPEN-NEXT/OKH-LOSH/raw/master/sample_data/okh-sample-LOSH-Dummy-A.ttl> .
 @prefix :         <#> .
-@prefix okh:      <https://w3id.org/oseg/ont/osh/okh#> .
+@prefix okh:      <https://w3id.org/oseg/ont/okh#> .
 @prefix obo:      <http://purl.obolibrary.org/obo/> .
 @prefix owl:      <http://www.w3.org/2002/07/owl#> .
 @prefix rdf:      <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@@ -13,8 +13,8 @@
 @prefix xsd:      <http://www.w3.org/2001/XMLSchema#> .
 @prefix schema:   <http://schema.org/> .
 @prefix epo:      <http://data.epo.org/linked-data/def/patent/> .
-@prefix otrl:     <https://w3id.org/oseg/ont/osh/otrl#> .
-@prefix tsdc:     <https://w3id.org/oseg/ont/osh/tsdc/core#> .
+@prefix otrl:     <https://w3id.org/oseg/ont/otrl#> .
+@prefix tsdc:     <https://w3id.org/oseg/ont/tsdc/core#> .
 
 :LOSHdummyMOSHA
   a okh:Module ;
diff --git a/sample_data/okh-sample-OHLOOM.ttl b/sample_data/okh-sample-OHLOOM.ttl
index bcdc9ddb..8a81b3f8 100644
--- a/sample_data/okh-sample-OHLOOM.ttl
+++ b/sample_data/okh-sample-OHLOOM.ttl
@@ -5,7 +5,7 @@
 
 @base             <https://github.com/OPEN-NEXT/OKH-LOSH/raw/master/sample_data/okh-sample-OHLOOM.ttl> .
 @prefix :         <#> .
-@prefix okh:      <https://w3id.org/oseg/ont/osh/okh#> .
+@prefix okh:      <https://w3id.org/oseg/ont/okh#> .
 @prefix obo:      <http://purl.obolibrary.org/obo/> .
 @prefix owl:      <http://www.w3.org/2002/07/owl#> .
 @prefix rdf:      <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@@ -13,8 +13,8 @@
 @prefix xsd:      <http://www.w3.org/2001/XMLSchema#> .
 @prefix schema:   <http://schema.org/> .
 @prefix epo:      <http://data.epo.org/linked-data/def/patent/> .
-@prefix otrl:     <https://w3id.org/oseg/ont/osh/otrl#> .
-@prefix tsdc:     <https://w3id.org/oseg/ont/osh/tsdc/core#> .
+@prefix otrl:     <https://w3id.org/oseg/ont/otrl#> .
+@prefix tsdc:     <https://w3id.org/oseg/ont/tsdc/core#> .
 
 :OHLOOM
   a okh:Module ;