diff --git a/modules/mod-Publish-And-Subscribe-System/type/interfaces.ts b/modules/mod-Publish-And-Subscribe-System/type/interfaces.ts
index ded9b6e..86f5e29 100644
--- a/modules/mod-Publish-And-Subscribe-System/type/interfaces.ts
+++ b/modules/mod-Publish-And-Subscribe-System/type/interfaces.ts
@@ -291,7 +291,7 @@ export interface ITopicMatcher {
 export type observableCallback<T> = (content: T | null, sender: string, timeStamp: number | null, ...data) => void;
 export type waitForCallback<T> = (content?: T | null, sender?: string, timeStamp?: number | null, ...data) => boolean | Promise<boolean>;
 
-export interface IObservable<T> {
+export interface IObservable<T,S = T,G = T> {
 
     /**
      * The ID of the Observable
@@ -303,23 +303,20 @@ export interface IObservable<T> {
      */
     type: 'observable';
 
-
-    /**
-     * Element containing the value.
-     */
-    value: T | null;
-
     _value: T | null;
 
     /**
      * Stores the specified Setter internally
      */
-    setter: ((value: T | null, sender: string | null, timeStamp: number | null, ...data) => T | null) | null;
+    setter: ((value: S | null, sender: string | null, timeStamp: number | null, ...data) => {
+        data: T | null,
+        valid: boolean,
+    }) | null;
 
     /**
      * Stores the specified Getter
      */
-    getter: ((value: T | null) => T | null) | null;
+    getter: ((value: T | null) => G | null) | null;
 
     /**
      * Function to Set the Value.
@@ -328,12 +325,12 @@ export interface IObservable<T> {
      * @param timeStamp A Timestamp which could be provided
      * @param data Additional Data
      */
-    setContent(value: T | null, sender?: string | null, timeStamp?: number | null, ...data): void;
+    setContent(value: S | null, sender?: string | null, timeStamp?: number | null, ...data): void;
 
     /**
      * A Default Getter, to get the coresponding Value.
      */
-    getContent(): T | null;
+    getContent(): G | null;
 
     /**
      * Creates a Subscription for the value of the Observable
@@ -356,14 +353,14 @@ export interface IObservable<T> {
      * @param testCallback Function which implements the Condition to Pass
      * @param options Additional Options.
      */
-    waitFor(testCallback: waitForCallback<T>, options?: IWaitForOpitions): Promise<T>;
+    waitFor(testCallback: waitForCallback<G>, options?: IWaitForOpitions): Promise<G>;
 
     /**
      * Function to wait for an Update of the Data.
      * @param mode The mode
      * @param options Additional Options
      */
-    waitForUpdate(mode?: 'sync' | 'async', options?: ISubscriptionOptions): Promise<T>;
+    waitForUpdate(mode?: 'sync' | 'async', options?: ISubscriptionOptions): Promise<G>;
 
     /**
      * Forces Publishing an Update
@@ -389,11 +386,9 @@ export interface IObservable<T> {
      */
     options: any;
 
-    subscriptions: Set<ISubscription<T>>;
-
     dispose(): void;
 
-    observable: nopeObservable<T>;
+    observable: nopeObservable<G>;
 }
 
 /**