diff --git a/webapp/lsp/position.xqm b/webapp/lsp/position.xqm
index 47d0eb5..cb1509f 100644
--- a/webapp/lsp/position.xqm
+++ b/webapp/lsp/position.xqm
@@ -48,12 +48,12 @@ as xs:integer
 };
 
 (:~  convert index into Position :)
-declare function pos:toPosition($text as xs:string, $pos as xs:integer)
+declare function pos:toPosition($text as xs:string, $index as xs:integer)
 as pos:Position {
   let $nl:=characters($text)=>index-of(char("\n"))
   let $predicate:=fn($r, $i){
       let $next:=$nl[$i=>trace("I ")] 
-      return exists($next) and $next < $pos
+      return exists($next) and $next < $index
 }
         
   let $s:=  while-do(
@@ -61,7 +61,7 @@ as pos:Position {
   $predicate,
   fn($r,$i){ let $next:=$nl[$i] return {"off": $next+1,"line":$r?line+1}=>trace("AA ") }
 )
-return pos:Position($s?line,  $pos - $s?off)            
+return pos:Position($s?line,  $index - $s?off)            
 };