diff --git a/README.md b/README.md
index f3787af..cdde9cf 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,8 @@
 Work in progress. 
 
 An attempt to write a [Language Server Protocol](https://en.wikipedia.org/wiki/Language_Server_Protocol) server for and in XQuery 4.0. It tracks the draft specifications at https://qt4cg.org/
-It written for BaseX 12.0 and uses the [BaseX websocket](https://docs.basex.org/main/WebSockets) feature.
+It written for BaseX 12.0 and uses the [BaseX websocket](https://docs.basex.org/main/WebSockets) feature. See [The WebSocket Protocol
+RFC 6455](https://www.rfc-editor.org/rfc/rfc6455.html)
 
 # Demo
 The demos expect `Docker` or `Podman` on the local machine. This is only a requirement for the demos.
diff --git a/webapp/lsp/set.xqm b/webapp/lsp/set.xqm
index c27d4eb..79748b2 100644
--- a/webapp/lsp/set.xqm
+++ b/webapp/lsp/set.xqm
@@ -36,7 +36,7 @@ module namespace set = "http://qt4cg.org/atomic-set";
        except       as fn($set as set:atomic-set, $value as set:atomic-set) as set:atomic-set,
        * );
 
-   declare %private variable DATA := "'_data'"; 
+   declare %private variable $DATA := "'_data'"; 
    
    (:
       The private function set:replaceData processes the internal map
diff --git a/webapp/static/clients/codemirror/script.js b/webapp/static/clients/codemirror/script.js
index 1299d40..efaf2b7 100644
--- a/webapp/static/clients/codemirror/script.js
+++ b/webapp/static/clients/codemirror/script.js
@@ -85,7 +85,14 @@ $("symList").addEventListener("itemSelected", e => {
     console.log("SYM selection range", sel);
     const an = plugin.fromPosition(sel.start)
     const hd = plugin.fromPosition(sel.end)
-    view.dispatch({ selection: { anchor: an, head: hd }, scrollIntoView: true });
+    //view.dispatch({ selection: { anchor: an, head: hd }, scrollIntoView: true });
+
+    view.dispatch({ 
+        selection: { anchor: an, head: hd }, 
+        scrollIntoView: true ,
+        effects: [lsp.EditorView.scrollIntoView(an,{y:"center"})]
+    });
+
 });
 
 $("lint").onclick = async e => {