diff --git a/Isabelle_DOF-Unit-Tests/Concept_OntoReferencing.thy b/Isabelle_DOF-Unit-Tests/Concept_OntoReferencing.thy
index b3907f3..3351d4b 100644
--- a/Isabelle_DOF-Unit-Tests/Concept_OntoReferencing.thy
+++ b/Isabelle_DOF-Unit-Tests/Concept_OntoReferencing.thy
@@ -84,12 +84,12 @@ text*[d::D, a1 = "X3"] \<open> ... phasellus amet id massa nunc, pede suscipit r
 text\<open>Not only text-elements are "ontology-aware", proofs and code can this be too !\<close>
 
 \<comment> \<open>Referencing from and to a ML-code context:\<close>
-(*<*)
+
 ML*[c4::C, z = "Some @{A \<open>a1\<close>}"]\<open>
 fun fac x = if x  = 0  then 1 else x * (fac(x-1))
 val v = \<^value_>\<open>A.x (the (z @{C \<open>c4\<close>}))\<close> |> HOLogic.dest_number |> snd |> fac
 \<close>
-(*>*)
+
 definition*[a2::A, x=5, level="Some 1"] xx' where "xx' \<equiv> A.x @{A \<open>a1\<close>}" if "A.x @{A \<open>a1\<close>} = 5"
 
 lemma*[e5::E] testtest : "xx + A.x @{A \<open>a1\<close>} = yy + A.x @{A \<open>a1\<close>} \<Longrightarrow> xx = yy" by simp
@@ -141,20 +141,13 @@ close_monitor*[struct]
 
 text\<open>And the trace of the monitor is:\<close>
 ML\<open>val trace = @{trace_attribute struct}\<close>
-ML\<open>@{assert} (trace = 
-   [("Conceptual.A", "a0"), ("Conceptual.A", "a"), ("Conceptual.A", "ab"),
-    ("Conceptual.A", "ac"), ("Conceptual.C", "c1"), ("Conceptual.A", "a1"),
-    ("Conceptual.C", "c1"), ("Conceptual.D", "d"), ("Conceptual.C", "c4"),
-    ("Conceptual.A", "a2"), ("Conceptual.E", "e5"), ("Conceptual.E", "e6"),
-    ("Conceptual.E", "e6"), ("Conceptual.C", "c2"), ("Conceptual.F", "f")]) \<close>
-(* BUG : DECLARATIONS SHOULD NOT BE TRACED, JUST DEFINITIONS.
 ML\<open>@{assert} (trace = 
    [("Conceptual.A", "a0"), ("Conceptual.A", "a"), ("Conceptual.A", "ab"),
     ("Conceptual.A", "ac"), ("Conceptual.A", "a1"),
     ("Conceptual.C", "c1"), ("Conceptual.D", "d"), ("Conceptual.C", "c4"),
     ("Conceptual.A", "a2"), ("Conceptual.E", "e5"), 
     ("Conceptual.E", "e6"), ("Conceptual.C", "c2"), ("Conceptual.F", "f")]) \<close>
-*)
+
 
 text\<open>Note that the monitor \<^typ>\<open>M\<close> of the ontology \<^theory>\<open>Isabelle_DOF-Ontologies.Conceptual\<close> does
      not observe the common entities of \<^theory>\<open>Isabelle_DOF.Isa_COL\<close>, but just those defined in the 
diff --git a/Isabelle_DOF-Unit-Tests/TestKit.thy b/Isabelle_DOF-Unit-Tests/TestKit.thy
index c35a0c6..985b1a3 100644
--- a/Isabelle_DOF-Unit-Tests/TestKit.thy
+++ b/Isabelle_DOF-Unit-Tests/TestKit.thy
@@ -59,9 +59,8 @@ fun gen_enriched_document_command2 name {body} cid_transform attr_transform mark
                                       val file = {path = Path.make [oid' ^ "_snippet.tex"],
                                                   pos = @{here}, 
                                                   content = Bytes.string strg}
-                                      
-                                      val _ = Generated_Files.write_file (Path.make ["latex_test"]) 
-                                                                         file
+                                      val dir = Path.append (Resources.master_directory thy) (Path.make ["latex_test"]) 
+                                      val _ = Generated_Files.write_file dir file
                                       val _ = writeln (strg)
                                   in  () end \<comment> \<open>important observation: thy is not modified.
                                                   This implies that several text block can be 
diff --git a/Isabelle_DOF/latex/styles/DOF-core.sty b/Isabelle_DOF/latex/styles/DOF-core.sty
index c7b53ca..0d6f061 100644
--- a/Isabelle_DOF/latex/styles/DOF-core.sty
+++ b/Isabelle_DOF/latex/styles/DOF-core.sty
@@ -165,3 +165,7 @@
 \author{No Author Given}
 \input{ontologies}
 \IfFileExists{preamble.tex}{\input{preamble.tex}}{}%
+
+% notation
+\newcommand{\isactrltermUNDERSCORE}{\isakeywordcontrol{term{\isacharunderscore}}}
+\newcommand{\isactrlvalueUNDERSCORE}{\isakeywordcontrol{value{\isacharunderscore}}}
\ No newline at end of file
diff --git a/Isabelle_DOF/thys/Isa_DOF.thy b/Isabelle_DOF/thys/Isa_DOF.thy
index 6265150..7f02484 100644
--- a/Isabelle_DOF/thys/Isa_DOF.thy
+++ b/Isabelle_DOF/thys/Isa_DOF.thy
@@ -699,6 +699,13 @@ fun get_value_local oid ctxt  =
   let val Instance v = get_instance_global oid (Proof_Context.theory_of ctxt)
   in v |> #value end
 
+fun get_defined_global oid thy  = let val Instance d = get_instance_global oid thy
+                                       in d |> #defined end
+
+fun get_defined_local oid ctxt  =
+  let val Instance d = get_instance_global oid (Proof_Context.theory_of ctxt)
+  in d |> #defined end
+
 (* missing : setting terms to ground (no type-schema vars, no schema vars. )*)
 
 fun binding_from_pos get_objects get_object_name name thy  =
@@ -1621,7 +1628,10 @@ fun register_oid_cid_in_open_monitors oid pos cid_pos thy =
                       (Name_Space.dest_table (DOF_core.get_monitor_infos (Proof_Context.init_global thy)))
       fun conv_attrs (((lhs, pos), opn), rhs) = (markup2string lhs,pos,opn, 
                                                  Syntax.read_term_global thy rhs)
-      val trace_attr = [((("trace", @{here}), "+="), "[("^cid_long^", ''"^oid^"'')]")]
+      val defined = DOF_core.get_defined_global oid thy
+      val trace_attr = if defined
+                       then [((("trace", @{here}), "+="), "[("^cid_long^", ''"^oid^"'')]")]
+                       else []
       val assns' = map conv_attrs trace_attr
       fun cid_of oid = let val DOF_core.Instance params = DOF_core.get_instance_global oid thy
                         in #cid params end
@@ -1631,8 +1641,12 @@ fun register_oid_cid_in_open_monitors oid pos cid_pos thy =
       fun def_trans_value oid =
         (#1 o (calc_update_term {mk_elaboration=true} thy (cid_of oid) assns'))
         #> value ctxt
-      val _ = if null enabled_monitors then () else writeln "registrating in monitors ..." 
-      val _ = app (fn (n, _) => writeln(oid^" : "^cid_long^" ==> "^n)) enabled_monitors;
+      val _ = if null enabled_monitors
+              then ()
+              else if defined
+                   then (tracing "registrating in monitors ..." ;
+                         app (fn (n, _) => tracing (oid^" : "^cid_long^" ==> "^n)) enabled_monitors)
+                   else ()
       (* check that any transition is possible: *)
       fun class_inv_checks thy =
         enabled_monitors