diff --git a/packages/chili-builder/src/appBuilder.ts b/packages/chili-builder/src/appBuilder.ts
index f51d54d3..4946afe3 100644
--- a/packages/chili-builder/src/appBuilder.ts
+++ b/packages/chili-builder/src/appBuilder.ts
@@ -2,7 +2,6 @@
 
 import { Application, CommandService, EditEventHandler, EditorService, HotkeyService } from "chili";
 import {
-    DefaultDataExchange,
     I18n,
     IDataExchange,
     IDocument,
@@ -15,6 +14,7 @@ import {
     Logger,
 } from "chili-core";
 import { IAdditionalModule } from "./additionalModule";
+import { DefaultDataExchange } from "./defaultDataExchange";
 
 export class AppBuilder {
     protected readonly _inits: (() => Promise<void>)[] = [];
diff --git a/packages/chili-builder/src/defaultDataExchange.ts b/packages/chili-builder/src/defaultDataExchange.ts
new file mode 100644
index 00000000..11cf10f1
--- /dev/null
+++ b/packages/chili-builder/src/defaultDataExchange.ts
@@ -0,0 +1,126 @@
+// Copyright 2022-2023 the Chili authors. All rights reserved. AGPL-3.0 license.
+
+import {
+    EditableShapeNode,
+    I18n,
+    IDataExchange,
+    IDocument,
+    IShape,
+    PubSub,
+    Result,
+    ShapeNode,
+    VisualNode,
+} from "chili-core";
+
+async function importBrep(document: IDocument, file: File) {
+    const shape = document.application.shapeFactory.converter.convertFromBrep(await file.text());
+    if (!shape.isOk) {
+        return Result.err(shape.error);
+    }
+    return Result.ok(new EditableShapeNode(document, file.name, shape.value));
+}
+
+async function exportBrep(document: IDocument, shapes: IShape[]) {
+    const comp = document.application.shapeFactory.combine(shapes);
+    if (!comp.isOk) {
+        return Result.err(comp.error);
+    }
+    return document.application.shapeFactory.converter.convertToBrep(comp.value);
+}
+
+export class DefaultDataExchange implements IDataExchange {
+    importFormats(): string[] {
+        return [".step", ".stp", ".iges", ".igs", ".brep"];
+    }
+
+    exportFormats(): string[] {
+        return [".step", ".iges", ".brep"];
+    }
+
+    async import(document: IDocument, files: FileList | File[]): Promise<void> {
+        for (const file of files) {
+            await this.handleSingleFileImport(document, file);
+        }
+    }
+
+    private async handleSingleFileImport(document: IDocument, file: File) {
+        const nodeResult = file.name.endsWith(".brep")
+            ? await importBrep(document, file)
+            : await this.handleStepIgesImport(document, file);
+
+        if (!nodeResult?.isOk) return;
+
+        const node = nodeResult.value;
+        node.name = file.name;
+        document.addNode(node);
+        document.visual.update();
+    }
+
+    private async handleStepIgesImport(document: IDocument, file: File) {
+        const content = new Uint8Array(await file.arrayBuffer());
+
+        if (this.isStepFile(file.name)) {
+            return document.application.shapeFactory.converter.convertFromSTEP(document, content);
+        }
+
+        if (this.isIgesFile(file.name)) {
+            return document.application.shapeFactory.converter.convertFromIGES(document, content);
+        }
+
+        alert(I18n.translate("error.import.unsupportedFileType:{0}", file.name));
+        return undefined;
+    }
+
+    async export(type: string, nodes: VisualNode[]): Promise<BlobPart[] | undefined> {
+        if (!this.validateExportType(type)) return;
+
+        const shapes = this.getExportShapes(nodes);
+        if (!shapes.length) return;
+
+        const shapeResult = await this.convertShapes(type, nodes[0].document, shapes);
+        return this.handleExportResult(shapeResult);
+    }
+
+    private validateExportType(type: string): boolean {
+        const isValid = this.exportFormats().includes(type);
+        !isValid && PubSub.default.pub("showToast", "error.import.unsupportedFileType:{0}", type);
+        return isValid;
+    }
+
+    private getExportShapes(nodes: VisualNode[]): IShape[] {
+        const shapes = nodes.filter((x): x is ShapeNode => x instanceof ShapeNode).map((x) => x.shape.value);
+
+        !shapes.length && PubSub.default.pub("showToast", "error.export.noNodeCanBeExported");
+        return shapes;
+    }
+
+    private async convertShapes(type: string, doc: IDocument, shapes: IShape[]) {
+        if (type === ".step") return this.handleStepExport(doc, shapes);
+        if (type === ".iges") return this.handleIgesExport(doc, shapes);
+        return exportBrep(doc, shapes);
+    }
+
+    private handleStepExport(doc: IDocument, shapes: IShape[]) {
+        return doc.application.shapeFactory.converter.convertToSTEP(...shapes);
+    }
+
+    private handleIgesExport(doc: IDocument, shapes: IShape[]) {
+        return doc.application.shapeFactory.converter.convertToIGES(...shapes);
+    }
+
+    private handleExportResult(result: Result<string> | undefined) {
+        if (!result?.isOk) {
+            PubSub.default.pub("showToast", "error.default:{0}", result?.error);
+            return undefined;
+        }
+        return [result.value];
+    }
+
+    private isStepFile(filename: string) {
+        return filename.endsWith(".step") || filename.endsWith(".stp");
+    }
+
+    private isIgesFile(filename: string) {
+        return filename.endsWith(".iges") || filename.endsWith(".igs");
+    }
+}
diff --git a/packages/chili-core/src/dataExchange.ts b/packages/chili-core/src/dataExchange.ts
index 87f28fdc..5b6ad292 100644
--- a/packages/chili-core/src/dataExchange.ts
+++ b/packages/chili-core/src/dataExchange.ts
@@ -1,9 +1,7 @@
 // Copyright 2022-2023 the Chili authors. All rights reserved. AGPL-3.0 license.
 
 import { IDocument } from "./document";
-import { PubSub, Result } from "./foundation";
-import { I18n } from "./i18n";
-import { FolderNode, ShapeNode, VisualNode } from "./model";
+import { VisualNode } from "./model";
 
 export interface IDataExchange {
     importFormats(): string[];
@@ -11,54 +9,3 @@ 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 shape: Result<FolderNode>;
-            if (file.name.endsWith(".step") || file.name.endsWith(".stp")) {
-                shape = document.application.shapeFactory.converter.convertFromSTEP(document, content);
-            } else if (file.name.endsWith(".iges") || file.name.endsWith(".igs")) {
-                shape = document.application.shapeFactory.converter.convertFromIGES(document, content);
-            } else {
-                alert(I18n.translate("error.import.unsupportedFileType:{0}", file.name));
-                continue;
-            }
-            if (!shape.isOk) {
-                PubSub.default.pub("showToast", "error.default:{0}", shape.error);
-                continue;
-            }
-            shape.value.name = file.name;
-            document.addNode(shape.value);
-            document.visual.update();
-        }
-    }
-
-    async export(type: string, nodes: VisualNode[]): Promise<BlobPart[] | undefined> {
-        let shapes = nodes.filter((x) => x instanceof ShapeNode).map((x) => x.shape.value);
-        if (shapes.length === 0) {
-            PubSub.default.pub("showToast", "error.export.noNodeCanBeExported");
-            return undefined;
-        }
-        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", "error.default:{0}", shapeString.error);
-            return undefined;
-        }
-
-        return [shapeString.value];
-    }
-}