diff --git a/README.md b/README.md
index b0a8192..b2544f6 100644
--- a/README.md
+++ b/README.md
@@ -96,7 +96,7 @@ Usage: isabelle DOF_mkroot [OPTIONS] [DIR]
     -n NAME      alternative session name (default: DIR base name)
     -o ONTOLOGY  (default: core)
        Available ontologies:
-       * cenelec_50126
+       * cenelec_50128
        * core
        * mathex
        * scholarly_paper
diff --git a/ROOT b/ROOT
index 7254537..a975506 100644
--- a/ROOT
+++ b/ROOT
@@ -4,7 +4,7 @@ session "Isabelle_DOF" = "Functional-Automata" +
     "Regular-Sets"
   theories
     Isa_DOF
-    "ontologies/CENELEC_50126"
+    "ontologies/CENELEC_50128"
     "ontologies/Conceptual"
     "ontologies/scholarly_paper"
     "ontologies/technical_report"
diff --git a/document-generator/latex/DOF-cenelec_50126.sty b/document-generator/latex/DOF-cenelec_50128.sty
similarity index 92%
rename from document-generator/latex/DOF-cenelec_50126.sty
rename to document-generator/latex/DOF-cenelec_50128.sty
index 9038f26..6971d7d 100644
--- a/document-generator/latex/DOF-cenelec_50126.sty
+++ b/document-generator/latex/DOF-cenelec_50128.sty
@@ -12,9 +12,9 @@
 %%   SPDX-License-Identifier: LPPL-1.0+ OR BSD-2-Clause
 
 \NeedsTeXFormat{LaTeX2e}\relax
-\ProvidesPackage{DOF-cenelec_50126}
+\ProvidesPackage{DOF-cenelec_50128}
   [0000/00/00 Unreleased v0.0.0+%
-  Document-Type Support Framework for Isabelle (CENELEC 50126).]
+  Document-Type Support Framework for Isabelle (CENELEC 50128).]
 
 \RequirePackage{DOF-core}
 
diff --git a/examples/cenelec/Example.thy b/examples/cenelec/Example.thy
index 02694d9..7fd66bb 100644
--- a/examples/cenelec/Example.thy
+++ b/examples/cenelec/Example.thy
@@ -1,7 +1,7 @@
 chapter\<open> Example : Forward and Standard (use-after-define) Referencing\<close>
 
 theory Example
-  imports  "../../ontologies/CENELEC_50126" 
+  imports  "../../ontologies/CENELEC_50128" 
            "../../ontologies/scholarly_paper"
 begin
 
@@ -28,12 +28,12 @@ text\<open>An "anonymous" text-item, automatically coerced into the top-class "t
 text*[tralala] \<open> Brexit means Brexit \<close> 
 
 text\<open>Examples for declaration of typed doc-items "assumption" and "hypothesis",
-     concepts defined in the underlying ontology @{theory "CENELEC_50126"}. \<close>
+     concepts defined in the underlying ontology @{theory "CENELEC_50128"}. \<close>
 text*[ass1::assumption] \<open> The subsystem Y is safe. \<close>
 text*[hyp1::hypothesis] \<open> P inequal NP \<close>
   
 text\<open>A real example fragment from a larger project, declaring a text-element as a
-     "safety-related application condition", a concept defined in the  @{theory "CENELEC_50126"}
+     "safety-related application condition", a concept defined in the  @{theory "CENELEC_50128"}
      ontology:\<close>  
 
 text*[new_ass::hypothesis]\<open>Under the assumption @{assumption \<open>ass1\<close>} we establish the following: ... \<close>
diff --git a/ontologies/CENELEC_50126.thy b/ontologies/CENELEC_50128.thy
similarity index 98%
rename from ontologies/CENELEC_50126.thy
rename to ontologies/CENELEC_50128.thy
index bf52f91..358e9b3 100644
--- a/ontologies/CENELEC_50126.thy
+++ b/ontologies/CENELEC_50128.thy
@@ -11,7 +11,7 @@ identifies:
  \<close> 
 
 (*<<*)  
-theory CENELEC_50126
+theory CENELEC_50128
   imports  "../Isa_COL"
 begin
 (*>>*) 
@@ -311,7 +311,7 @@ text\<open>The category @{emph \<open>hypothesis\<close>} is used for assumption
 datatype hyp_type = physical | mathematical | computational | other
 
 
-typ "CENELEC_50126.requirement"
+typ "CENELEC_50128.requirement"
 
 doc_class hypothesis = requirement +
       hyp_type :: hyp_type <= physical  (* default *)
@@ -426,10 +426,10 @@ DOF_core.name2doc_class_name @{theory} "srac";
 DOF_core.is_defined_cid_global "srac" @{theory};
 DOF_core.is_defined_cid_global "ec" @{theory};
 "XXXXXXXXXXXXXXXXX";
-DOF_core.is_subclass @{context} "CENELEC_50126.ec" "CENELEC_50126.ec";
-DOF_core.is_subclass @{context} "CENELEC_50126.srac" "CENELEC_50126.ec";
-DOF_core.is_subclass @{context} "CENELEC_50126.ec"   "CENELEC_50126.srac";
-DOF_core.is_subclass @{context} "CENELEC_50126.ec"   "CENELEC_50126.test_requirement";
+DOF_core.is_subclass @{context} "CENELEC_50128.ec" "CENELEC_50128.ec";
+DOF_core.is_subclass @{context} "CENELEC_50128.srac" "CENELEC_50128.ec";
+DOF_core.is_subclass @{context} "CENELEC_50128.ec"   "CENELEC_50128.srac";
+DOF_core.is_subclass @{context} "CENELEC_50128.ec"   "CENELEC_50128.test_requirement";
 "XXXXXXXXXXXXXXXXX";
 val {docobj_tab={maxano, tab=ref_tab},docclass_tab=class_tab,...} = DOF_core.get_data @{context};
 Symtab.dest ref_tab;
diff --git a/test/cenelec/Example.thy b/test/cenelec/Example.thy
index 48756f8..cd5c874 100644
--- a/test/cenelec/Example.thy
+++ b/test/cenelec/Example.thy
@@ -1,5 +1,5 @@
 theory Example
-  imports  "../../ontologies/CENELEC_50126"
+  imports  "../../ontologies/CENELEC_50128"
 begin
 
 section{* Some show-off's of general antiquotations. *}
diff --git a/test/simple/Example.thy b/test/simple/Example.thy
index 47106ee..718869a 100644
--- a/test/simple/Example.thy
+++ b/test/simple/Example.thy
@@ -1,5 +1,5 @@
 theory Example
-  imports  "../../ontologies/CENELEC_50126"
+  imports  "../../ontologies/CENELEC_50128"
   keywords "Term" :: diag 
 begin