diff --git a/src/models/VNFInstanceModel.ts b/src/models/VNFInstanceModel.ts
index de69c1e..4fd63db 100644
--- a/src/models/VNFInstanceModel.ts
+++ b/src/models/VNFInstanceModel.ts
@@ -79,3 +79,9 @@
     VNFD?: string;
     VNFID?: string;
 }
+/** interface for the nsdInstanceData */
+export interface InstanceData {
+    MemberIndex?: string;
+    VNFInstanceId?: string;
+    VNFD?: string;
+}