diff --git a/Isabelle_DOF/ontologies/CC_v3_1_R5/CC_terminology.thy b/Isabelle_DOF-Ontologies/CC_v3_1_R5/CC_terminology.thy
similarity index 100%
rename from Isabelle_DOF/ontologies/CC_v3_1_R5/CC_terminology.thy
rename to Isabelle_DOF-Ontologies/CC_v3_1_R5/CC_terminology.thy
diff --git a/Isabelle_DOF/ontologies/CC_v3_1_R5/CC_v3_1_R5.thy b/Isabelle_DOF-Ontologies/CC_v3_1_R5/CC_v3_1_R5.thy
similarity index 99%
rename from Isabelle_DOF/ontologies/CC_v3_1_R5/CC_v3_1_R5.thy
rename to Isabelle_DOF-Ontologies/CC_v3_1_R5/CC_v3_1_R5.thy
index e11acd16..14e81764 100644
--- a/Isabelle_DOF/ontologies/CC_v3_1_R5/CC_v3_1_R5.thy
+++ b/Isabelle_DOF-Ontologies/CC_v3_1_R5/CC_v3_1_R5.thy
@@ -45,7 +45,7 @@ doc_class toe_ref_cls = CC_text_element +
     toe_version:: "(int \<times> int \<times> int)"
     prod_name::"string option" <= None
 
-
+(*
 doc_class toe_ovrw_cls = CC_text_element +
     toe_type     :: string
     software_req :: "CC_text_element list" <= "[]"
@@ -62,17 +62,17 @@ doc_class toe_ovrw_cls = CC_text_element +
                       |    _ \<Rightarrow>  undefined)"
 
 thm eal_consistency_inv_def
-
+*)
 doc_class toe_desc_cls = CC_text_element +
     software_list    :: "CC_text_element list" <= "[]"
     hardware_list    :: "CC_text_element list" <= "[]" 
     firmeware_list   :: "CC_text_element list" <= "[]"
     sec_features_list:: "CC_text_element list" <= "[]"
-  
+(*  
 doc_class ST_INTRO_MNT = CC_structure_element +
     tag_id:: string
     accepts "\<lbrace>st_ref_cls\<rbrace>\<^sup>* ~~ \<lbrace>toe_ref_cls\<rbrace>\<^sup>* ~~ \<lbrace>toe_ovrw_cls\<rbrace>\<^sup>* ~~ \<lbrace>toe_desc_cls\<rbrace>\<^sup>*"
-
+*)
 doc_class cc_conf_claim_cls = CC_text_element +
     cc_version:: string
     ext_srs_list::"CC_text_element list option"
@@ -160,7 +160,7 @@ doc_class sars_ratio_cls = CC_text_element +
 doc_class SEC_REQ_MNT =
   spd_id:: string
   accepts "(\<lbrace>sfrs_cls\<rbrace>\<^sup>+ ~~ \<lbrace>sfrs_ratio_cls\<rbrace>\<^sup>+ ~~ \<lbrace>sars_cls\<rbrace>\<^sup>+ ~~ \<lbrace>sars_ratio_cls\<rbrace>\<^sup>+)"
-
+(*
 doc_class ST_MNT = CC_structure_element +
    tag_id :: string
    level :: EALs
@@ -169,6 +169,6 @@ doc_class ST_MNT = CC_structure_element +
              SEC_PROB_DEF_MNT ~~
              SEC_OBJ_MNT ~~
              SEC_REQ_MNT)"
-
+*)
 
 end
diff --git a/Isabelle_DOF/ontologies/Conceptual/Conceptual.thy b/Isabelle_DOF-Ontologies/Conceptual/Conceptual.thy
similarity index 100%
rename from Isabelle_DOF/ontologies/Conceptual/Conceptual.thy
rename to Isabelle_DOF-Ontologies/Conceptual/Conceptual.thy
diff --git a/Isabelle_DOF-Ontologies/ROOT b/Isabelle_DOF-Ontologies/ROOT
new file mode 100644
index 00000000..879f5efc
--- /dev/null
+++ b/Isabelle_DOF-Ontologies/ROOT
@@ -0,0 +1,11 @@
+session "Isabelle_DOF-Ontologies" = "Isabelle_DOF" + 
+  options [document = false]
+  directories
+    "CC_v3_1_R5"
+    "Conceptual"
+    "small_math"
+  theories
+    "CC_v3_1_R5/CC_v3_1_R5"
+    "CC_v3_1_R5/CC_terminology"  
+    "Conceptual/Conceptual"
+    "small_math/small_math"
diff --git a/Isabelle_DOF/ontologies/small_math/small_math.thy b/Isabelle_DOF-Ontologies/small_math/small_math.thy
similarity index 100%
rename from Isabelle_DOF/ontologies/small_math/small_math.thy
rename to Isabelle_DOF-Ontologies/small_math/small_math.thy
diff --git a/Isabelle_DOF-Unit-Tests/AssnsLemmaThmEtc.thy b/Isabelle_DOF-Unit-Tests/AssnsLemmaThmEtc.thy
index 5f33288d..061c0dad 100644
--- a/Isabelle_DOF-Unit-Tests/AssnsLemmaThmEtc.thy
+++ b/Isabelle_DOF-Unit-Tests/AssnsLemmaThmEtc.thy
@@ -14,7 +14,7 @@
 theory 
   AssnsLemmaThmEtc
 imports 
-  "Isabelle_DOF.Conceptual"  
+  "Isabelle_DOF-Ontologies.Conceptual"  
   "Isabelle_DOF.scholarly_paper"
 begin
 
diff --git a/Isabelle_DOF-Unit-Tests/Attributes.thy b/Isabelle_DOF-Unit-Tests/Attributes.thy
index ea41c089..2646b55e 100644
--- a/Isabelle_DOF-Unit-Tests/Attributes.thy
+++ b/Isabelle_DOF-Unit-Tests/Attributes.thy
@@ -14,7 +14,7 @@
 theory 
   Attributes
 imports 
-  "Isabelle_DOF.Conceptual"
+  "Isabelle_DOF-Ontologies.Conceptual"
 begin
 
 section\<open>Elementary Creation of Doc-items and Access of their Attibutes\<close>
diff --git a/Isabelle_DOF-Unit-Tests/Concept_Example.thy b/Isabelle_DOF-Unit-Tests/Concept_Example.thy
index 95a8d44e..18298b5e 100644
--- a/Isabelle_DOF-Unit-Tests/Concept_Example.thy
+++ b/Isabelle_DOF-Unit-Tests/Concept_Example.thy
@@ -16,10 +16,10 @@ chapter\<open>Setting and modifying attributes of doc-items\<close>
 theory 
   Concept_Example
 imports 
-  "Isabelle_DOF.Conceptual" (* we use the generic "Conceptual" ontology *)
+  "Isabelle_DOF-Ontologies.Conceptual" (* we use the generic "Conceptual" ontology *)
 begin
 
-text\<open>@{theory "Isabelle_DOF.Conceptual"} provides a monitor @{typ M} enforcing a particular document structure.
+text\<open>@{theory "Isabelle_DOF-Ontologies.Conceptual"} provides a monitor @{typ M} enforcing a particular document structure.
      Here, we say: From now on, this structural rules are respected wrt. all doc\_classes M is
      enabled for.\<close>
 open_monitor*[struct::M]  
diff --git a/Isabelle_DOF-Unit-Tests/Concept_Example_Low_Level_Invariant.thy b/Isabelle_DOF-Unit-Tests/Concept_Example_Low_Level_Invariant.thy
index c32c9936..feb19c3c 100644
--- a/Isabelle_DOF-Unit-Tests/Concept_Example_Low_Level_Invariant.thy
+++ b/Isabelle_DOF-Unit-Tests/Concept_Example_Low_Level_Invariant.thy
@@ -16,7 +16,7 @@ chapter\<open>Setting and modifying attributes of doc-items\<close>
 theory 
   Concept_Example_Low_Level_Invariant
 imports 
-  "Isabelle_DOF.Conceptual" (* we use the generic "Conceptual" ontology *)
+  "Isabelle_DOF-Ontologies.Conceptual" (* we use the generic "Conceptual" ontology *)
 begin
 
 section\<open>Example: Standard Class Invariant\<close>
diff --git a/Isabelle_DOF-Unit-Tests/Evaluation.thy b/Isabelle_DOF-Unit-Tests/Evaluation.thy
index a84d9bb6..e2511a60 100644
--- a/Isabelle_DOF-Unit-Tests/Evaluation.thy
+++ b/Isabelle_DOF-Unit-Tests/Evaluation.thy
@@ -153,7 +153,7 @@ value*\<open>@{A-instances}\<close>
 text\<open>Warning: If you make a request on attributes that are undefined in some instances,
 you will get a result which includes these unresolved cases.
 In the following example, we request the instances of the @{doc_class A}.
-But we have defined an instance @{docitem \<open>test\<close>} in theory @{theory Isabelle_DOF.Conceptual}
+But we have defined an instance @{docitem \<open>test\<close>} in theory @{theory "Isabelle_DOF-Ontologies.Conceptual"}
 whose our theory inherits from, and this docitem instance does not initialize its attribute \<^emph>\<open>x\<close>.
 So in the request result we get an unresolved case because the evaluator can not get
 the value of the \<^emph>\<open>x\<close> attribute of the instance @{docitem \<open>test\<close>}:\<close>
diff --git a/Isabelle_DOF-Unit-Tests/ROOT b/Isabelle_DOF-Unit-Tests/ROOT
index 7f85b568..331e47f0 100644
--- a/Isabelle_DOF-Unit-Tests/ROOT
+++ b/Isabelle_DOF-Unit-Tests/ROOT
@@ -1,4 +1,4 @@
-session "Isabelle_DOF-Unit-Tests" = "Isabelle_DOF" + 
+session "Isabelle_DOF-Unit-Tests" = "Isabelle_DOF-Ontologies" + 
   options [document = false]
   theories
     "AssnsLemmaThmEtc" 
diff --git a/Isabelle_DOF-Unit-Tests/TermAntiquotations.thy b/Isabelle_DOF-Unit-Tests/TermAntiquotations.thy
index 12e406cb..1dc0990a 100644
--- a/Isabelle_DOF-Unit-Tests/TermAntiquotations.thy
+++ b/Isabelle_DOF-Unit-Tests/TermAntiquotations.thy
@@ -20,7 +20,7 @@ For historical reasons, \<^emph>\<open>term antiquotations\<close> are called th
 theory 
   TermAntiquotations
 imports 
-  "Isabelle_DOF.Conceptual"
+  "Isabelle_DOF-Ontologies.Conceptual"
 begin
 
 text\<open>Since the syntax chosen for values of doc-class attributes is HOL-syntax --- requiring
diff --git a/Isabelle_DOF/ROOT b/Isabelle_DOF/ROOT
index ca10fc28..aa393d93 100644
--- a/Isabelle_DOF/ROOT
+++ b/Isabelle_DOF/ROOT
@@ -7,17 +7,13 @@ session "Isabelle_DOF" = "Functional-Automata" +
     "thys/manual"
     "ontologies"
     "ontologies/CENELEC_50128"
-    "ontologies/Conceptual"
     "ontologies/scholarly_paper"
-    "ontologies/small_math"
     "ontologies/technical_report"
   theories [document = false]
     "ontologies/ontologies"
     "ontologies/technical_report/technical_report"
     "ontologies/scholarly_paper/scholarly_paper"
-    "ontologies/Conceptual/Conceptual"
     "ontologies/CENELEC_50128/CENELEC_50128"
-    "ontologies/small_math/small_math"
     "thys/RegExpInterface"
     "thys/Isa_DOF"
     "thys/Isa_COL"
diff --git a/Isabelle_DOF/ontologies/ontologies.thy b/Isabelle_DOF/ontologies/ontologies.thy
index 9ad877f8..c498e25d 100644
--- a/Isabelle_DOF/ontologies/ontologies.thy
+++ b/Isabelle_DOF/ontologies/ontologies.thy
@@ -15,10 +15,7 @@ theory
   ontologies
 imports
   "CENELEC_50128/CENELEC_50128"
-  "Conceptual/Conceptual"
   "scholarly_paper/scholarly_paper"
-  "small_math/small_math"
   "technical_report/technical_report"
-  (* "CC_v3_1_R5/CC_v3_1_R5" *)
 begin
 end
diff --git a/ROOTS b/ROOTS
index e56083c8..9b978874 100644
--- a/ROOTS
+++ b/ROOTS
@@ -1,4 +1,5 @@
 Isabelle_DOF
 Isabelle_DOF-Proofs
+Isabelle_DOF-Ontologies
 Isabelle_DOF-Unit-Tests
 Isabelle_DOF-Examples-Extra