diff --git a/tDataTypeTemplates/insertSelecetdLNodeType.spec.ts b/tDataTypeTemplates/insertSelecetdLNodeType.spec.ts
index e16ca14..9c11799 100644
--- a/tDataTypeTemplates/insertSelecetdLNodeType.spec.ts
+++ b/tDataTypeTemplates/insertSelecetdLNodeType.spec.ts
@@ -17,6 +17,7 @@ import {
 } from "./insertSelectedDataType.testfiles.js";
 
 import { insertSelectedLNodeType } from "./insertSelectedLNodeType.js";
+import { LNodeDescription, nsdToJson } from "./nsdToJson.js";
 
 const incompleteMmxu = findElement(missingMmxuTypes) as XMLDocument;
 const imcompleteLtrk = findElement(incompleteLtrkTypes) as XMLDocument;
@@ -24,20 +25,16 @@ const incompleteAtcc = findElement(incompleteAtccTypes) as XMLDocument;
 const missingDataTypes = findElement(emptySSD) as XMLDocument;
 
 describe("insertLNodeTypeSelection", () => {
-  it("return empty array with invlaid lnClass", () => {
-    expect(
-      insertSelectedLNodeType(incompleteMmxu, mmxuSelection, "ERRO").length,
-    ).to.equal(0);
-  });
-
-  it('is insensitive for invalid EnumTypes',()=>
-    insertSelectedLNodeType(incompleteMmxu, invalidSelection, "LLN0"))
+  it('is insensitive for invalid EnumTypes',()=> {
+    const data = nsdToJson("LLN0") as LNodeDescription;
+    insertSelectedLNodeType(incompleteMmxu, invalidSelection, {class:"LLN0", data});
+  })
 
   it("insert MMXU LNodeType including missing sub data", () => {
     const edits = insertSelectedLNodeType(
       incompleteMmxu,
       mmxuSelection,
-      "MMXU",
+      {class:"MMXU"},
     );
 
     expect(edits.length).to.equal(6);
@@ -81,10 +78,11 @@ describe("insertLNodeTypeSelection", () => {
   });
 
   it("insert LTRK LNodeType including missing sub data", () => {
+    const data = nsdToJson("LTRK") as LNodeDescription;
     const edits = insertSelectedLNodeType(
       imcompleteLtrk,
       ltrkSelection,
-      "LTRK",
+      {class:"LTRK", data},
     );
 
     expect(edits.length).to.equal(7);
@@ -136,10 +134,11 @@ describe("insertLNodeTypeSelection", () => {
   });
 
   it("insert ATCC LNodeType including missing sub data", () => {
+    const data = nsdToJson("ATCC") as LNodeDescription;
     const edits = insertSelectedLNodeType(
       incompleteAtcc,
       atccSelection,
-      "ATCC",
+      {class: "ATCC", data},
     );
 
     expect(edits.length).to.equal(5);
@@ -178,10 +177,11 @@ describe("insertLNodeTypeSelection", () => {
   });
 
   it("insert DataTypeTemplates when missing", () => {
+    const data = nsdToJson("ATCC") as LNodeDescription;
     const edits = insertSelectedLNodeType(
       missingDataTypes,
       atccSelection,
-      "ATCC",
+      {class:"ATCC", data},
     );
 
     expect(edits.length).to.equal(19);
diff --git a/tDataTypeTemplates/insertSelectedLNodeType.ts b/tDataTypeTemplates/insertSelectedLNodeType.ts
index 0a6f453..030d3a1 100644
--- a/tDataTypeTemplates/insertSelectedLNodeType.ts
+++ b/tDataTypeTemplates/insertSelectedLNodeType.ts
@@ -2,7 +2,7 @@
  * Basis is a copy from www.github.com/openenergytools/oscd-template-generator
  * originally written by ca-d, thx Chris. Code has been modified!
  */
-import { nsdToJson } from "./nsdToJson.js";
+import { LNodeDescription, nsdToJson } from "./nsdToJson.js";
 
 import { createElement, Insert, TreeSelection } from "../foundation/utils.js";
 
@@ -163,13 +163,13 @@ function data(lnData: any, path: string[]): any {
  * Creates a new data type `LNodeType` based on a user selection.
  * @param doc - the XML document to add the `LNodeType` to
  * @param selection - The user selection as a tree object
- * @param lnClass - the logical node class of the `LNodeType`
+ * @param logicalnode - the logical node class and its JSON data structure of the `LNodeType`
  * @returns an array of inserts for the `LNodeType` and the missing subs data
  */
 export function insertSelectedLNodeType(
   doc: XMLDocument,
   selection: TreeSelection,
-  lnClass: string,
+  logicalnode: {class: string, data?: LNodeDescription},
 ): Insert[] {
   const types = new Set<string>();
   const elements: Templates = {
@@ -179,8 +179,8 @@ export function insertSelectedLNodeType(
     EnumType: [],
   };
 
-  const lnData = nsdToJson(lnClass);
-  if (!lnData) return [];
+  const lnData = logicalnode.data ?? nsdToJson(logicalnode.class);
+  const lnClass = logicalnode.class;
 
   function isUnknownId(id: string): boolean {
     const alreadyCreate = types.has(id);
@@ -375,7 +375,7 @@ export function insertSelectedLNodeType(
   Object.keys(selection).forEach((name) => {
     const type = createDOType([name], selection[name]);
 
-    const { transient } = lnData[name];
+    const { transient } = (lnData as LNodeDescription)[name];
 
     const doElement = createElement(doc, "DO", { name, type, transient });