diff --git a/doc/UsersGuide/interface.mos b/doc/UsersGuide/interface.mos
index 1397652ec48..af15a09dad1 100644
--- a/doc/UsersGuide/interface.mos
+++ b/doc/UsersGuide/interface.mos
@@ -1,5 +1,5 @@
 loadString("
-function trim
+function trim \" Trim leading whitespace\"
   input String s;
   output String o;
 protected
@@ -9,7 +9,7 @@ algorithm
   o := a[1];
 end trim;
 
-function reSTInterface
+function reSTInterface \"Generate re-structured text documentation for MetaModelica function\"
   input OpenModelica.Scripting.TypeName cl;
   output String out;
 protected
@@ -35,17 +35,11 @@ algorithm
   end if;
 end reSTInterface;
 
-function isDeprecatedVersion
+function isDeprecatedVersion \"Return true if version of type name is deprecated.\"
   input OpenModelica.Scripting.TypeName cl;
   output Boolean deprecated;
-protected
-  String version = OpenModelica.Scripting.getVersion(cl);
 algorithm
-  if stringEq(version, \"Deprecated\") then
-    deprecated := true;
-  else
-    deprecated := false;
-  end if;
+  deprecated := stringEq(OpenModelica.Scripting.getVersion(cl), \"Deprecated\");
 end isDeprecatedVersion;
 ");
 getErrorString();