diff --git a/lib/src/example_modules/httpInterfaceServer.ts b/lib/src/example_modules/httpInterfaceServer.ts
index 62fcd27..ee9bafd 100644
--- a/lib/src/example_modules/httpInterfaceServer.ts
+++ b/lib/src/example_modules/httpInterfaceServer.ts
@@ -2,7 +2,7 @@ import type { Express } from "express";
 import express from "express";
 import { jsonization, types } from "@aas-core-works/aas-core3.0-typescript";
 import AASInterfaceServer from "../server";
-import type { OnRequestCallback, Request } from "types/requests";
+import type { OnRequestCallback, Request } from "../types/requests";
 import Traverser from "../helper/traverser";
 
 export type Config = {
@@ -11,8 +11,8 @@ export type Config = {
 }
 
 export default class HTTPInterfaceServer extends AASInterfaceServer<Config> {
-    public readonly name: string = "HTTPInterfaceServer";
-    public readonly supportsSubscriptions: boolean = false; // TODO, longpolling?
+    public static serverInterfaceName: string = "HTTPInterfaceServer";
+    public static supportsSubscriptions: boolean = false; // TODO, longpolling?
 
     private app: Express = express();
     private server: any = null;
@@ -62,6 +62,10 @@ export default class HTTPInterfaceServer extends AASInterfaceServer<Config> {
             }
         }
 
+        this.app.use("/*", (req, res, next) => {
+            console.log(req.originalUrl); next();
+        });
+
         // /aas
         this.app.get("/aas", (_, res) => res.json(jsonization.toJsonable(this.aas)).end());
         this.app.put("/aas", NOT_IMPLEMENTED);
@@ -88,8 +92,10 @@ export default class HTTPInterfaceServer extends AASInterfaceServer<Config> {
         this.app.put("/aas/submodels/:smId", NOT_IMPLEMENTED);
         this.app.patch("/aas/submodels/:smId", NOT_IMPLEMENTED);
         this.app.delete("/aas/submodels/:smId", NOT_IMPLEMENTED);
+
         // /aas/submodels/:smId/submodel-elements
-        this.app.use("/aas/submodels/:smId/submodel-elements", (req, res) => {
+        this.app.use("/aas/submodels/:smId/submodel-elements", (req, res, next) => {
+            if (req.path !== "/") return next();
             if (req.method !== "GET") return res.status(501).end();
 
             const sm = getSM(req.params.smId);
@@ -101,7 +107,6 @@ export default class HTTPInterfaceServer extends AASInterfaceServer<Config> {
         // Main function
         this.app.use("/aas/submodels/:smId/submodel-elements/*", (req, res) => {
             const idShortPathString = (req.params as any)[0];
-            console.log(idShortPathString);
             if (idShortPathString.endsWith("/")) res.status(400).end();
 
             const sm = getSM(req.params.smId);
@@ -126,6 +131,7 @@ export default class HTTPInterfaceServer extends AASInterfaceServer<Config> {
 
             const idShortPath = endingMatch ? idShortPathString.replace(new RegExp(`${endingMatch}$`), "").split("/") : idShortPathString.split("/");
 
+            console.log(idShortPath, endingMatch)
             
             switch (endingMatch) {
                 case undefined: {
diff --git a/lib/src/example_modules/mqttConnector.ts b/lib/src/example_modules/mqttConnector.ts
index 5c50997..c21d364 100644
--- a/lib/src/example_modules/mqttConnector.ts
+++ b/lib/src/example_modules/mqttConnector.ts
@@ -1,12 +1,12 @@
 import * as mqtt from "mqtt";
-import InterfaceConnectionObject from "interfaceConnectionObject";
+import InterfaceConnectionObject from "../interfaceConnectionObject";
 import type { types } from "@aas-core-works/aas-core3.0-typescript";
 
 export default class MQTTConnector extends InterfaceConnectionObject<mqtt.IClientOptions> {
-    public readonly name: string = "MQTT Connector";
-    public readonly uriProtocol: string[] = ["mqtt", "mqtts"];
-    public readonly connectionType: "ON_DEMAND" | "PERMANENT" = "PERMANENT";
-    public readonly supportsSubscriptions: boolean = true;
+    public static readonly connectorName: string = "MQTT Connector";
+    public static readonly uriProtocol: string[] = ["mqtt", "mqtts"];
+    public static readonly connectionType: "ON_DEMAND" | "PERMANENT" = "PERMANENT";
+    public static readonly supportsSubscriptions: boolean = true;
 
     private client: mqtt.MqttClient|null = null;
 
@@ -15,6 +15,7 @@ export default class MQTTConnector extends InterfaceConnectionObject<mqtt.IClien
     public connect(): boolean {
         if (!this.client) this.client = mqtt.connect(this.endpointMetadata.base, this.connectionParameter);
         this.client.on("message", (topic, message) => {
+            //console.log(`${topic}: ${message.toString("utf-8")}`)
             // If json is expected you could parse it here
             this.messageStore[topic] = message.toString("utf-8");
             // Notify observers
@@ -32,13 +33,18 @@ export default class MQTTConnector extends InterfaceConnectionObject<mqtt.IClien
     }
 
     public readProperty(prop: types.Property): any {
+        console.log(prop);
         const cc = this.mapper.get(prop);
+        console.log(cc);
         if (cc === undefined) return null;
 
         const errorReturn = cc.default ?? null;
         if (!this.client || !this.client.connected) return errorReturn;
 
-        const value = cc.forms.map(f => this.messageStore[f.href.substring(1)]).filter(v => v !== undefined)[0];
+        console.log(this.messageStore)
+
+        const value = this.messageStore[cc.forms.href.substring(1)];
+        console.log(value)
         if (value === undefined) return errorReturn;
         switch (cc.type) {
             case "integer":
@@ -58,7 +64,7 @@ export default class MQTTConnector extends InterfaceConnectionObject<mqtt.IClien
         const cc = this.mapper.get(prop);
         if (cc === undefined || !this.client || !this.client.connected) return false;
 
-        const topic = cc.forms.map(f => f.href.substring(1))[0];
+        const topic = cc.forms.href.substring(1);
         if (topic === undefined) return false;
 
         this.client.publish(topic, value.toString());
@@ -70,10 +76,9 @@ export default class MQTTConnector extends InterfaceConnectionObject<mqtt.IClien
         const cc = this.mapper.get(prop);
         if (cc === undefined || !cc.observable || !this.client || !this.client.connected) return false;
 
-        cc.forms.map(f => f.href.substring(1)).forEach(topic => {
-            if (this.observerStore[topic] === undefined) this.observerStore[topic] = [callback];
-            else this.observerStore[topic].push(callback);
-        });
+        const topic = cc.forms.href.substring(1);
+        if (this.observerStore[topic] === undefined) this.observerStore[topic] = [callback];
+        else this.observerStore[topic].push(callback);
 
         return true;
     }
diff --git a/lib/src/helper/traverser.ts b/lib/src/helper/traverser.ts
index 86c6b7f..cde1c6e 100644
--- a/lib/src/helper/traverser.ts
+++ b/lib/src/helper/traverser.ts
@@ -1,7 +1,7 @@
 
 import { types } from "@aas-core-works/aas-core3.0-typescript";
 import { RelationshipElement } from "@aas-core-works/aas-core3.0-typescript/dist/types/types";
-import { ResolvedRelationshipElement } from "types/common";
+import { ResolvedRelationshipElement } from "../types/common";
 
 const GLOBALLY_IDENTIFIABLES = [types.KeyTypes.GlobalReference, types.KeyTypes.AssetAdministrationShell, types.KeyTypes.ConceptDescription, types.KeyTypes.Identifiable, types.KeyTypes.Submodel]
 
diff --git a/lib/src/index.ts b/lib/src/index.ts
index 0a2343e..86dd12a 100644
--- a/lib/src/index.ts
+++ b/lib/src/index.ts
@@ -1,10 +1,12 @@
 import MultiMessageBroker from "./multimessageBroker";
 import HTTPInterfaceServer from "./example_modules/httpInterfaceServer";
 import FileImporter from "./helper/fileImporter";
+import MQTTConnector from "./example_modules/mqttConnector";
 
-const aas = FileImporter.readAASByPath("../AID-AIMC-Full-Example-20230911T1608.json");
+const aas = FileImporter.readAASByPath("../owntest.json");
 
 const broker = new MultiMessageBroker();
+broker.registerInterfaceConnection({ interfaceConnection: MQTTConnector, config: { reconnectPeriod: 1000 }})
 broker.registerAAS({ aas, serverInterfaces: { serverInterface: HTTPInterfaceServer, config: { bindPort: 3000, bindAddress: "0.0.0.0" } } });
 
 broker.prepare();
diff --git a/lib/src/interfaceConnectionObject.ts b/lib/src/interfaceConnectionObject.ts
index ba701c3..0899714 100644
--- a/lib/src/interfaceConnectionObject.ts
+++ b/lib/src/interfaceConnectionObject.ts
@@ -1,17 +1,17 @@
 import type { types } from "@aas-core-works/aas-core3.0-typescript";
 import AIMCMapper from "./parser/AIMCMapper";
 import { v4 } from "uuid";
-import type { EndpointMetadata } from "types/aidConf";
+import type { EndpointMetadata } from "./types/aidConf";
 
 type ConnectionType = "ON_DEMAND" | "PERMANENT";
 
 export type OnEventCallback = (response: any) => void
 
 export default abstract class InterfaceConnectionObject<ConfigInterface> {
-    public abstract readonly name: string;
-    public abstract readonly uriProtocol: string[]|string;
-    public abstract readonly connectionType: ConnectionType;
-    public abstract readonly supportsSubscriptions: boolean;
+    public static readonly connectorName: string;
+    public static readonly uriProtocol: string[]|string;
+    public static readonly connectionType: ConnectionType;
+    public static readonly supportsSubscriptions: boolean;
 
     protected readonly observerStore: Record<any, ((value: any) => void)[]> = {};
     protected readonly eventSubStore: Record<any, ((value: any) => void)[]> = {};
diff --git a/lib/src/multimessageBroker.ts b/lib/src/multimessageBroker.ts
index a522d68..ce8ed7d 100644
--- a/lib/src/multimessageBroker.ts
+++ b/lib/src/multimessageBroker.ts
@@ -1,9 +1,10 @@
 import { types } from "@aas-core-works/aas-core3.0-typescript";
 import type AASInterfaceServer from "./server";
-import type { Request } from "types/requests";
+import type { Request } from "./types/requests";
 import type InterfaceConnectionObject from "interfaceConnectionObject";
 import AIMCMapper from "./parser/AIMCMapper";
 import AIDParser from "./parser/AIDParser";
+import { EndpointMetadata } from "types/aidConf";
 
 type AASRegistration = {
     aas: types.Environment,
@@ -55,7 +56,7 @@ export default class MultiMessageBroker {
             registration.serverInstances = registration.serverInterfaces.map(serverInterface => {
                 try {
                     // @ts-ignore
-                    const server = new serverInterface.serverInterface<typeof serverInterface.config>(serverInterface.config, registration.aas, registration.mappingConfiguration, (req: Request) => this.onInterfaceRequest(req, registration));
+                    const server = new serverInterface.serverInterface<typeof serverInterface.config>(serverInterface.config, registration.aas, (req: Request) => this.onInterfaceRequest(req, registration));
                     server.prepare();
                     return server;
                 } catch (e) {
@@ -68,13 +69,23 @@ export default class MultiMessageBroker {
             if (!interfaceDescription) continue;
 
             const endpoints = Object.values(interfaceDescription).flatMap(idEntries => idEntries.map(entry => entry.EndPointMetadata));
-            const uniqueProtocols = [...new Set(endpoints.map(endpoint => new URL(endpoint.base).protocol))];
+            const uniqueProtocols: Record<string, EndpointMetadata[]> = {};
+            
+            endpoints.forEach(endpoint => {
+                const pUrl = new URL(endpoint.base);
+                if (!uniqueProtocols[pUrl.protocol]) uniqueProtocols[pUrl.protocol] = [endpoint];
+                else uniqueProtocols[pUrl.protocol].push(endpoint);
+            });
 
-            for (const protocol of uniqueProtocols) {
-                const connectorProto = this.interfaceConnections.find(connection => connection.interfaceConnection.prototype.uriProtocol.includes(protocol))
+            for (const [protocol, endpoints] of Object.entries(uniqueProtocols)) {
+                const connectorProto = this.interfaceConnections.find(connection => {
+                    const protos = typeof connection.interfaceConnection.uriProtocol === "string" ? [connection.interfaceConnection.uriProtocol] : connection.interfaceConnection.uriProtocol;
+                    return protos.map(proto => proto.endsWith(":") ? proto : proto + ":").includes(protocol.endsWith(":") ? protocol : protocol + ":");
+                });
                 if (connectorProto === undefined) continue;
+
                 // @ts-ignore
-                registration.connectorInterfaces.push(new connectorProto.interfaceConnection(connectorProto.config, registration.mappingConfiguration, (response: any) => this.onConnectorEvent(response)));
+                for (const ep of endpoints) registration.connectorInterfaces.push(new connectorProto.interfaceConnection(connectorProto.config, ep, registration.mappingConfiguration, (response: any) => this.onConnectorEvent(response)));
             }
         }
 
@@ -85,6 +96,7 @@ export default class MultiMessageBroker {
         if (!this.prepared) this.prepare();
 
         for (const registration of this.aasRegistrations) {
+            registration.connectorInterfaces.forEach(connector => connector.connect());
             registration.serverInstances?.forEach(server => server?.run());
         }
     }
diff --git a/lib/src/parser/AIDParser.ts b/lib/src/parser/AIDParser.ts
index dc8924d..5b8a991 100644
--- a/lib/src/parser/AIDParser.ts
+++ b/lib/src/parser/AIDParser.ts
@@ -1,12 +1,12 @@
 import * as aasCore from "@aas-core-works/aas-core3.0-typescript";
-import type { AssetInterfacesDescription, EndpointMetadata, InterfaceDescription, InterfaceMetadata, InterfaceAction, InterfaceEvent, InterfaceProperty, InterfacePropertyForm } from "types/aidConf";
+import type { AssetInterfacesDescription, EndpointMetadata, InterfaceDescription, InterfaceMetadata, InterfaceAction, InterfaceEvent, InterfaceProperty, InterfacePropertyForm } from "../types/aidConf";
 import { AvailableEndpoint, endpointAvailable } from "../types/common";
 import Traverser from "../helper/traverser";
 
 export default class AIDParser {
 
     public static parse(env: aasCore.types.Environment): AssetInterfacesDescription | null {
-        const sm = Traverser.findSMByIdShort(env, "AssetInterfaceDescription");
+        const sm = Traverser.findSMByIdShort(env, "AssetInterfacesDescription");
         if (sm === null || sm.submodelElements === null) return null;
 
         const parsed = {} as AssetInterfacesDescription;
@@ -28,11 +28,11 @@ export default class AIDParser {
     }
 
     private static parseAIDEntry(entry: aasCore.types.SubmodelElementCollection, endpointProtocol?: AvailableEndpoint): InterfaceDescription | null {
-        const title = Traverser.findElement(entry, element => (element as any).idShort.toLocaleLowerCase() === "title");
+        const title = Traverser.findElement(entry, element => (element as any).idShort?.toLocaleLowerCase() === "title");
         const titleString = title !== null && aasCore.types.isProperty(title) && title.value ? title.value : "";
 
-        const ep = Traverser.findElement(entry, element => (element as any).idShort.toLocaleLowerCase() === "endpointmetadata");
-        const im = Traverser.findElement(entry, element => (element as any).idShort.toLocaleLowerCase() === "interfacemetadata");
+        const ep = Traverser.findElement(entry, element => (element as any).idShort?.toLocaleLowerCase() === "endpointmetadata");
+        const im = Traverser.findElement(entry, element => (element as any).idShort?.toLocaleLowerCase() === "interfacemetadata");
         if (ep === null || !aasCore.types.isSubmodelElementCollection(ep) || !ep.value || im === null || !aasCore.types.isSubmodelElementCollection(im) || !im.value) return null;
 
         const parsedEp = AIDParser.parseEndpointMetaData(ep, endpointProtocol);
@@ -53,7 +53,7 @@ export default class AIDParser {
         const parsed = {} as EndpointMetadata;
 
         for (const key of ["base", "contentType"]) {
-            const prop = Traverser.findElement(endpoint, element => (element as any).idShort.toLocaleLowerCase() === key.toLocaleLowerCase());
+            const prop = Traverser.findElement(endpoint, element => (element as any).idShort?.toLocaleLowerCase() === key.toLocaleLowerCase());
             if (prop === null || !aasCore.types.isProperty(prop) || !prop.value) return null; // Mandatory
             else parsed[key] = prop.value;
         }
@@ -73,7 +73,7 @@ export default class AIDParser {
             events: []
         } as InterfaceMetadata;
 
-        const prop = Traverser.findElement(interfaceMeta, element => (element as any).idShort.toLocaleLowerCase() === "properties");
+        const prop = Traverser.findElement(interfaceMeta, element => (element as any).idShort?.toLocaleLowerCase() === "properties");
         if (prop === null || !aasCore.types.isSubmodelElementList(prop) || !prop.value) return null; // Mandatory
         for (const element of prop.overValueOrEmpty()) {
             if (!aasCore.types.isSubmodelElementCollection(element)) continue;
@@ -82,7 +82,7 @@ export default class AIDParser {
             parsed.properties.push(parsedProp);
         }
 
-        const actions = Traverser.findElement(interfaceMeta, element => (element as any).idShort.toLocaleLowerCase() === "actions");
+        const actions = Traverser.findElement(interfaceMeta, element => (element as any).idShort?.toLocaleLowerCase() === "actions");
         if (actions === null || !aasCore.types.isSubmodelElementList(actions) || !actions.value) return null; // Mandatory
         for (const element of actions.overValueOrEmpty()) {
             if (!aasCore.types.isSubmodelElementCollection(element)) continue;
@@ -95,32 +95,24 @@ export default class AIDParser {
     }
 
     public static parseInterfaceMetadataProperty(prop: aasCore.types.SubmodelElementCollection, endpointProtocol?: AvailableEndpoint): InterfaceProperty | null {
-        if (!aasCore.types.isSubmodelElementCollection(prop) || !prop.value || prop.idShort?.toLocaleLowerCase() !== "properties") return null;
+        if (!aasCore.types.isSubmodelElementCollection(prop) || !prop.value) return null;
 
         const parsed = {} as InterfaceProperty;
 
         // This does not matter in any way for the interface
         /* for (const key of ["title", "observeable", "type"]) {
-            const prop = AASStore.findElement(prop, element => (element as any).idShort.toLocaleLowerCase() === key.toLocaleLowerCase());
+            const prop = AASStore.findElement(prop, element => (element as any).idShort?.toLocaleLowerCase() === key.toLocaleLowerCase());
             if (prop === null || !aasCore.types.isProperty(prop) || !prop.value) continue; // Not mandatory
             else parsed[key] = prop.value;
-        } */
-
-        const parsedForms = [] as InterfacePropertyForm[];
-
-        const forms = Traverser.findElement(prop, element => (element as any).idShort.toLocaleLowerCase() === "forms");
-        if (forms === null || !aasCore.types.isSubmodelElementList(forms) || !forms.value) return null; // Mandatory
-        for (const element of forms.overValueOrEmpty()) {
-            if (!aasCore.types.isSubmodelElementCollection(element)) continue;
-            const parsedForm = AIDParser.parseInterfaceMetadataPropertyForm(element, endpointProtocol);
-            if (parsedForm === null) continue;
-            parsedForms.push(parsedForm);
-        }
+        } */;
 
+        const forms = Traverser.findElement(prop, element => (element as any).idShort?.toLocaleLowerCase() === "forms");
+        if (forms === null || !aasCore.types.isSubmodelElementCollection(forms) || !forms.value) return null; // Mandatory
+        const parsedForm = AIDParser.parseInterfaceMetadataPropertyForm(forms, endpointProtocol);
+        if (parsedForm === null) return null;
         // TODO 
         // Other values based on endpoint protocol
-
-        return { ...parsed, forms: parsedForms } as InterfaceProperty;
+        return { ...parsed, forms: parsedForm } as InterfaceProperty;
     }
 
     private static parseInterfaceMetadataPropertyForm(form: aasCore.types.SubmodelElementCollection, endpointProtocol?: AvailableEndpoint): InterfacePropertyForm | null {
@@ -129,7 +121,7 @@ export default class AIDParser {
         const parsed = {} as any;
 
         for (const key of ["href", "contentType"]) {
-            const prop = Traverser.findElement(form, element => (element as any).idShort.toLocaleLowerCase() === key.toLocaleLowerCase());
+            const prop = Traverser.findElement(form, element => (element as any).idShort?.toLocaleLowerCase() === key.toLocaleLowerCase());
             if (prop === null || !aasCore.types.isProperty(prop) || !prop.value) return null; // Mandatory
             else parsed[key] = prop.value;
         }
diff --git a/lib/src/parser/AIMCMapper.ts b/lib/src/parser/AIMCMapper.ts
index 05b4133..fbc3c99 100644
--- a/lib/src/parser/AIMCMapper.ts
+++ b/lib/src/parser/AIMCMapper.ts
@@ -1,7 +1,7 @@
 import { types } from "@aas-core-works/aas-core3.0-typescript";
-import { ConnectionConfiguration, AIMCMap } from "types/aimcConf";
+import { ConnectionConfiguration, AIMCMap } from "../types/aimcConf";
 import AIMCParser from "./AIMCParser";
-import Traverser from "helper/traverser";
+import Traverser from "../helper/traverser";
 import AIDParser from "./AIDParser";
 import { SubmodelElementCollection } from "@aas-core-works/aas-core3.0-typescript/dist/types/types";
 
@@ -31,14 +31,22 @@ export default class AIMCMapper {
                         const resolved = Traverser.resolveRelationship(this.env, ssm);
                         if (resolved === null) continue;
 
-                        const parsedPropConf = AIDParser.parseInterfaceMetadataProperty(resolved.second as SubmodelElementCollection);
+                        let {first, second} = resolved;
+
+                        let parsedPropConf = AIDParser.parseInterfaceMetadataProperty(first as SubmodelElementCollection);
+                        if (parsedPropConf === null) {
+                            // maybe the property is in the first element
+                            [first, second] = [second, first];
+                            parsedPropConf = AIDParser.parseInterfaceMetadataProperty(first as SubmodelElementCollection);
+                        }
                         if (parsedPropConf === null) continue;
 
-                        this.map.set(resolved.first, {
+                        this.map.set(second, {
                             ...ep,
                             ...parsedPropConf
                         });
                     }
+                    console.log(this.map)
 
                 }
             }
@@ -65,8 +73,8 @@ export default class AIMCMapper {
         const result = [];
 
         for (const [e, cc] of this.map.entries()) {
-            const paths = cc.forms.map(f => cc.base + f.href);
-            if (paths.includes(path)) result.push(e);
+            const formsPath = cc.base + cc.forms.href;
+            if (formsPath === path) result.push(e);
         }
 
         return result;
diff --git a/lib/src/parser/AIMCParser.ts b/lib/src/parser/AIMCParser.ts
index 4c55335..fd9066a 100644
--- a/lib/src/parser/AIMCParser.ts
+++ b/lib/src/parser/AIMCParser.ts
@@ -1,12 +1,12 @@
 import * as aasCore from "@aas-core-works/aas-core3.0-typescript";
-import Traverser from "helper/traverser";
-import { AssetInterfacesMappingConfiguration, MappingConfEntry, MappingConfiguration } from "types/aimcConf";
-import { endpointAvailable, ResolvedRelationshipElement } from "types/common";
+import Traverser from "../helper/traverser";
+import { AssetInterfacesMappingConfiguration, MappingConfEntry, MappingConfiguration } from "../types/aimcConf";
+import { endpointAvailable, ResolvedRelationshipElement } from "../types/common";
 
 export default class AIMCParser {
 
     public static parse(env: aasCore.types.Environment): AssetInterfacesMappingConfiguration | null {
-        const sm = Traverser.findSMByIdShort(env, "AssetInterfaceMappingConfiguration");
+        const sm = Traverser.findSMByIdShort(env, "AssetInterfacesMappingConfiguration");
         if (sm === null || sm.submodelElements === null) return null;
 
         const parsed = {} as AssetInterfacesMappingConfiguration;
@@ -28,12 +28,12 @@ export default class AIMCParser {
     }
 
     public static parseAIMCEntry(entry: aasCore.types.SubmodelElementCollection, environment: aasCore.types.Environment): MappingConfEntry | null {
-        const ep = Traverser.findElement(entry, element => (element as any).idShort.toLocaleLowerCase() === "endpointmetadatareference");
-        const mc = Traverser.findElement(entry, element => (element as any).idShort.toLocaleLowerCase() === "mappingconfiguration");
-        if (ep === null || !aasCore.types.isReference(ep) || !ep.keys || !ep.keys[0] || !mc || !aasCore.types.isSubmodelElementList(mc) || !mc.value) return null;
+        const ep = Traverser.findElement(entry, element => (element as any).idShort?.toLocaleLowerCase() === "endpointmetadatareference");
+        const mc = Traverser.findElement(entry, element => (element as any).idShort?.toLocaleLowerCase() === "mappingconfiguration");
+        if (ep === null || !aasCore.types.isReferenceElement(ep) || !ep.value || !ep.value.keys || !ep.value.keys[0] || !mc || !aasCore.types.isSubmodelElementList(mc) || !mc.value) return null;
 
-        const resolvedEp = Traverser.resolveReference(environment, ep);
-        if (resolvedEp === null || !aasCore.types.isSubmodelElementCollection(resolvedEp) || resolvedEp.idShort?.toLocaleLowerCase() !== "endpointmetadatareference") return null;        
+        const resolvedEp = Traverser.resolveReference(environment, ep.value);
+        if (resolvedEp === null || !aasCore.types.isSubmodelElementCollection(resolvedEp) || resolvedEp.idShort?.toLocaleLowerCase() !== "endpointmetadata") return null;
 
         const parsedMc: (MappingConfiguration|null)[] = []
         for (const conf of mc.overValueOrEmpty()) {
@@ -57,13 +57,13 @@ export default class AIMCParser {
             SourceSinkMappings: []
         } as any;
 
-        const ifMetaRef = Traverser.findElement(conf, element => (element as any).idShort.toLocaleLowerCase() === "interfacemetadatareference");
-        if (!ifMetaRef || !aasCore.types.isReference(ifMetaRef) || !ifMetaRef.keys) return null;
-        const ifMeta = Traverser.resolveReference(env, ifMetaRef);
+        const ifMetaRef = Traverser.findElement(conf, element => (element as any).idShort?.toLocaleLowerCase() === "interfacemetadatareference");
+        if (!ifMetaRef || !aasCore.types.isReferenceElement(ifMetaRef) || !ifMetaRef.value || !ifMetaRef.value.keys || !ifMetaRef.value.keys[0]) return null;
+        const ifMeta = Traverser.resolveReference(env, ifMetaRef.value);
         if (!ifMeta || !aasCore.types.isSubmodelElementCollection(ifMeta) || ifMeta.idShort?.toLocaleLowerCase() !== "interfacemetadata") return null;
         parsed.InterfaceMetaDataReference = ifMeta;
         
-        const sourceSinkMappings = Traverser.findElement(conf, element => (element as any).idShort.toLocaleLowerCase() === "sourcesinkmappings");
+        const sourceSinkMappings = Traverser.findElement(conf, element => (element as any).idShort?.toLocaleLowerCase() === "sourcesinkmappings");
         if (!sourceSinkMappings || !aasCore.types.isSubmodelElementList(sourceSinkMappings) || !sourceSinkMappings.value) return null;
 
         for (const ssm of sourceSinkMappings.overValueOrEmpty()) {
diff --git a/lib/src/server.ts b/lib/src/server.ts
index bea0051..12aa8f2 100644
--- a/lib/src/server.ts
+++ b/lib/src/server.ts
@@ -1,13 +1,13 @@
 import { types } from "@aas-core-works/aas-core3.0-typescript";
-import type { Request, OnRequestCallback } from "types/requests";
+import type { Request, OnRequestCallback } from "./types/requests";
 
 export default abstract class AASInterfaceServer<ConfigInterface> {
-    public abstract readonly name: string;
-    public abstract readonly supportsSubscriptions: boolean;
+    public static readonly serverInterfaceName: string;
+    public static readonly supportsSubscriptions: boolean;
     
     constructor(
         protected readonly config: ConfigInterface, 
-        protected readonly aas: types.Environment, 
+        protected readonly aas: types.Environment,
         protected readonly onRequestCallback: OnRequestCallback) {}
 
     public abstract prepare(): void;
diff --git a/lib/src/types/aidConf.ts b/lib/src/types/aidConf.ts
index ab1e3f5..dd38a0b 100644
--- a/lib/src/types/aidConf.ts
+++ b/lib/src/types/aidConf.ts
@@ -30,7 +30,7 @@ export type InterfaceMetadata = {
 export type InterfaceProperty = {
     title?: string;
     observable?: boolean;
-    forms: InterfacePropertyForm[];
+    forms: InterfacePropertyForm;
     type?: string;
     enum?: string[];
     const?: any;
diff --git a/lib/tsconfig.json b/lib/tsconfig.json
index d6dcbfd..2c9d8a7 100644
--- a/lib/tsconfig.json
+++ b/lib/tsconfig.json
@@ -30,7 +30,7 @@
     "moduleResolution": "node",                          /* Specify how TypeScript looks up a file from a given module specifier. */
     "baseUrl": "src",                                  /* Specify the base directory to resolve non-relative module names. */
     "paths": {
-      "types/*": ["types/*"]
+      "types/*": ["types/*"],
     },                                      /* Specify a set of entries that re-map imports to additional lookup locations. */
     // "rootDirs": [],                                   /* Allow multiple folders to be treated as one when resolving modules. */
     // "typeRoots": [],                                  /* Specify multiple folders that act like './node_modules/@types'. */