Index: Explorator/trunk/app/views/layouts/_toolbar.rhtml
===================================================================
--- Explorator/trunk/app/views/layouts/_toolbar.rhtml	(revision 140)
+++ Explorator/trunk/app/views/layouts/_toolbar.rhtml	(revision 147)
@@ -13,11 +13,11 @@
     <div class = "toolbar">
         <div class ='_setparameter' id = ':s' exp = "S">
-            <span class="tool">S<span class="tip">This element will be used in the expression (S,P,O)</span></span>
+            <span class="tool">S<span class="tip">Subject of the SPO expression. It can be a set of classes, instances or predicates.</span></span>
         </div>
         <div class ='_setparameter' id = ':p' exp = "P">
-            <span class="tool">P<span class="tip">This element will be used in the expression (S,P,O)</span></span>
+            <span class="tool">P<span class="tip">Predicates of the SPO expression. Only set of predicates (green elements on the interface).</span></span>
         </div>
         <div class ='_setparameter' id = ':o' exp = "O">
-            <span class="tool">O<span class="tip">This element will be used in the expression (S,P,O)</span></span>
+            <span class="tool">O<span class="tip">Objects of the SPO expression. It can be a set of classes, instances or predicates.</span></span>
         </div>
         <!--