diff --git a/src/app/messages/messages.component.ts b/src/app/messages/messages.component.ts
index 4649205..acadec0 100644
--- a/src/app/messages/messages.component.ts
+++ b/src/app/messages/messages.component.ts
@@ -23,7 +23,7 @@ export class MessagesComponent implements OnInit {
 
   ngOnInit() {
     this.websocketService.connect();
-    this.websocketService.observeAnchor<Message>('message').subscribe(
+    this.websocketService.observeKey<Message>('message').subscribe(
       (event) => {
         this.messages.push(event.data);
         event.data.message = this.convert(event.data.message);
diff --git a/src/app/services/fsmupdate.service.ts b/src/app/services/fsmupdate.service.ts
index 6423ca5..eabd14d 100644
--- a/src/app/services/fsmupdate.service.ts
+++ b/src/app/services/fsmupdate.service.ts
@@ -11,7 +11,7 @@ export class FSMUpdateService {
   constructor(private websocketService: WebSocketService) {}
 
   public init(): void {
-    this.websocketService.observeAnchor<FSMUpdate>('FSMUpdate').subscribe((event) => {
+    this.websocketService.observeKey<FSMUpdate>('FSMUpdate').subscribe((event) => {
       this.current_state = event.data.current_state;
       this.valid_transitions = event.data.valid_transitions;
     });
diff --git a/src/app/services/websocket.service.ts b/src/app/services/websocket.service.ts
index b9b0b3f..ef7eab4 100644
--- a/src/app/services/websocket.service.ts
+++ b/src/app/services/websocket.service.ts
@@ -41,17 +41,17 @@ export class WebSocketService {
     console.log('ws connected');
   }
 
-  public observeAnchor<T>(anchor: string): Observable<WSMessage<T>> {
-    return this.downlink.pipe(filter(message => message.anchor === anchor));
+  public observeKey<T>(key: string): Observable<WSMessage<T>> {
+    return this.downlink.pipe(filter(message => message.key === key));
   }
 
-  public send(anchor: string, data: any): void {
+  public send(key: string, data: any): void {
     // If the WebSocket is not connected then the QueueingSubject will ensure
     // that messages are queued and delivered when the WebSocket reconnects.
     // A regular Subject can be used to discard messages sent when the WebSocket
     // is disconnected.
     this.uplink.next({
-      'anchor': anchor,
+      'key': key,
       'data': data
     });
   }
diff --git a/src/app/services/wsmessage.ts b/src/app/services/wsmessage.ts
index 6326d5d..22f20eb 100644
--- a/src/app/services/wsmessage.ts
+++ b/src/app/services/wsmessage.ts
@@ -1,4 +1,4 @@
 export class WSMessage<T> {
-  anchor: string;
+  key: string;
   data: T;  // TODO: sane annotation
 }
diff --git a/src/app/webide/webide.component.ts b/src/app/webide/webide.component.ts
index 7509f20..b4d542e 100644
--- a/src/app/webide/webide.component.ts
+++ b/src/app/webide/webide.component.ts
@@ -25,7 +25,7 @@ const defaultSourceCode = `alert( 'Hello, world!' );`;
   styleUrls: ['./webide.component.scss']
 })
 export class WebideComponent implements OnInit {
-  anchor_id = 'anchor_webide';
+  key_id = 'webide';
   filename = 'demo.js';
   code: string = defaultSourceCode;
   language = 'javascript';
@@ -47,7 +47,7 @@ export class WebideComponent implements OnInit {
   }
 
   subscribeWS() {
-    this.webSocketService.observeAnchor<SourceCode>(this.anchor_id).subscribe((event) => {
+    this.webSocketService.observeKey<SourceCode>(this.key_id).subscribe((event) => {
       this.command_handlers[event.data.command](event.data);
       this.changeDetectorRef.detectChanges();
     });
@@ -81,7 +81,7 @@ export class WebideComponent implements OnInit {
   }
 
   sendCode() {
-    this.webSocketService.send(this.anchor_id, {
+    this.webSocketService.send(this.key_id, {
       'command': 'write',
       'content': this.code
     });
@@ -89,13 +89,13 @@ export class WebideComponent implements OnInit {
   }
 
   requestCode() {
-    this.webSocketService.send(this.anchor_id, {
+    this.webSocketService.send(this.key_id, {
       'command': 'read'
     });
   }
 
   selectCode(filename: string) {
-    this.webSocketService.send(this.anchor_id, {
+    this.webSocketService.send(this.key_id, {
       'command': 'select',
       'filename': filename
     });