diff --git a/packages/chili-builder/src/appBuilder.ts b/packages/chili-builder/src/appBuilder.ts
index 7d34b2ce..f51d54d3 100644
--- a/packages/chili-builder/src/appBuilder.ts
+++ b/packages/chili-builder/src/appBuilder.ts
@@ -2,6 +2,7 @@
 
 import { Application, CommandService, EditEventHandler, EditorService, HotkeyService } from "chili";
 import {
+    DefaultDataExchange,
     I18n,
     IDataExchange,
     IDocument,
@@ -12,7 +13,6 @@ import {
     IVisualFactory,
     IWindow,
     Logger,
-    VisualNode,
 } from "chili-core";
 import { IAdditionalModule } from "./additionalModule";
 
@@ -103,20 +103,7 @@ export class AppBuilder {
     }
 
     initDataExchange(): IDataExchange {
-        return {
-            importFormats(): string[] {
-                return ["chili3d"];
-            },
-            exportFormats(): string[] {
-                return ["chili3d"];
-            },
-            import(document: IDocument, files: FileList | File[]): Promise<void> {
-                return Promise.reject("not implemented");
-            },
-            export(type: string, nodes: VisualNode[]): Promise<BlobPart[] | undefined> {
-                return Promise.reject("not implemented");
-            },
-        };
+        return new DefaultDataExchange();
     }
 
     private ensureNecessary() {
diff --git a/packages/chili-core/src/dataExchange.ts b/packages/chili-core/src/dataExchange.ts
index 5b6ad292..471e964d 100644
--- a/packages/chili-core/src/dataExchange.ts
+++ b/packages/chili-core/src/dataExchange.ts
@@ -1,7 +1,8 @@
 // Copyright 2022-2023 the Chili authors. All rights reserved. AGPL-3.0 license.
 
 import { IDocument } from "./document";
-import { VisualNode } from "./model";
+import { PubSub } from "./foundation";
+import { EditableShapeNode, NodeLinkedList, ShapeNode, VisualNode } from "./model";
 
 export interface IDataExchange {
     importFormats(): string[];
@@ -9,3 +10,50 @@ export interface IDataExchange {
     import(document: IDocument, files: FileList | File[]): Promise<void>;
     export(type: string, nodes: VisualNode[]): Promise<BlobPart[] | undefined>;
 }
+
+export class DefaultDataExchange implements IDataExchange {
+    importFormats(): string[] {
+        return [".step", ".stp", ".iges", ".igs"];
+    }
+
+    exportFormats(): string[] {
+        return [".step", ".iges"];
+    }
+
+    async import(document: IDocument, files: FileList | File[]): Promise<void> {
+        for (const file of files) {
+            let content = new Uint8Array(await file.arrayBuffer());
+            let factory = document.application.shapeFactory.converter.convertFromIGES;
+            if (file.name.endsWith(".step") || file.name.endsWith(".stp")) {
+                factory = document.application.shapeFactory.converter.convertFromSTEP;
+            }
+            let shape = factory(content);
+            if (!shape.isOk) {
+                PubSub.default.pub("showToast", "toast.read.error");
+                return;
+            }
+            let shapes = shape.value.map((x, i) => {
+                return new EditableShapeNode(document, `Imported ${i}`, x);
+            });
+            let nodeList = new NodeLinkedList(document, file.name);
+            document.addNode(nodeList);
+            nodeList.add(...shapes);
+            document.visual.update();
+        }
+    }
+
+    async export(type: string, nodes: VisualNode[]): Promise<BlobPart[] | undefined> {
+        let shapes = nodes.map((x) => (x as ShapeNode).shape.value);
+        let factory = nodes[0].document.application.shapeFactory.converter.convertToIGES;
+        if (type === ".step") {
+            factory = nodes[0].document.application.shapeFactory.converter.convertToSTEP;
+        }
+        let shapeString = factory(...shapes);
+        if (!shapeString.isOk) {
+            PubSub.default.pub("showToast", "toast.converter.error");
+            return undefined;
+        }
+
+        return [shapeString.value];
+    }
+}