diff --git a/lib/src/types/aidConf.ts b/lib/src/types/aidConf.ts
index e5309c5..9bdf3a7 100644
--- a/lib/src/types/aidConf.ts
+++ b/lib/src/types/aidConf.ts
@@ -27,22 +27,78 @@ export type InterfaceMetadata = {
     events: InterfaceEvent[];
 }
 
+/*
+So here are some changes to the original spec:
+IMO it is really redundant to have so many attributes for our property in the AID.
+These attributes like min and max should be set on the actual attribute, not in the AID.
+The AID should only contain the information about the endpoint and the type 
+(because the answer from the asset needs to be casted).
+The WoT spec also has way less information for the elements and their forms.
+Also their forms are using all the same interface (which is a good idea).
+Multiple forms (like for read and write) can be added to the same property.
+
+And last but not least: maybe we want some kind of transformation for the data.
+Like if the answer we're looking for is part of a JSON object, we can use a JSONPath to get the value.
+That does not seem to be included in the WoT so maybe add it to the AID?
+
+As the WoT currently focuses on HTTP, CoAP and MQTT, and the AID focuses on HTTP, MQTT and Modbus
+we focus on HTTP and MQTT for now.
+It should be pretty easy to extend this.
+
+So let's derive some of this from the WoT and see what we can achieve.
+*/
+
 export type InterfaceProperty = {
     title?: string;
     observable?: boolean;
     forms: InterfacePropertyForm;
     type?: string;
-    enum?: string[];
+    // enum?: string[];
     const?: any;
     default?: any;
-    //unit?: string;
-    minimum?: number; // TODO muss das gecapped werden?
-    maximum?: number;
-    minLength?: number;
-    maxLength?: number;
-    //items?: any[];
-    minItems?: number;
-    maxItems?: number;
+    // unit?: string;
+    // minimum?: number; // TODO muss das gecapped werden?
+    // maximum?: number;
+    // minLength?: number;
+    // maxLength?: number;
+    // items?: any[];
+    // minItems?: number;
+    // maxItems?: number;
+}
+
+type FormOp = "readproperty" | 
+"writeproperty" |
+"observeproperty" |
+"unobserveproperty" |
+"invokeaction" |
+"subscribeevent" |
+"unsubscribeevent" |
+"readallproperties" |
+"writeallproperties" |
+"readmultipleproperties" |
+"writemultipleproperties";
+
+type FormOpHTTP = "readproperty" |
+"writeproperty" |
+"invokeaction" |
+"readallproperties" |
+"writeallproperties" |
+"readmultipleproperties" |
+"writemultipleproperties";
+
+type IForm = {
+    href: string;
+    op: FormOp;
+    contentType: string;
+}
+
+type IFormHTTP = IForm & {
+    "htv:methodName": "GET" | "PUT" | "POST" | "DELETE" | "PATCH";
+    "htv:headers": {
+        "htv:fieldName": string;
+        "htv:fieldValue": string;
+    }[];
+    op: FormOpHTTP;
 }
 
 export type InterfacePropertyForm = InterfacePropertyFormHTTP | InterfacePropertyFormMQTT | InterfacePropertyFormModbus;
@@ -79,7 +135,23 @@ type InterfacePropertyFormMQTT = InterfacePropertyFormBase & {
 
 /** @alpha */
 export type InterfaceAction = {
-    // TODO
+    title: string;
+
+}
+
+type InterfaceActionBase = {
+    title: string;
+    type: string;
+    const?: boolean;
+}
+
+type InterfaceActionSync = {
+    
+
+}
+
+type InterfaceActionAsync = {
+
 }
 
 /** @alpha */