diff --git a/smocore/include/cologex.h b/smocore/include/cologex.h
index 6587ef1..0a67485 100644
--- a/smocore/include/cologex.h
+++ b/smocore/include/cologex.h
@@ -5,6 +5,8 @@
 #include <memory>
 #include <logic.h>
 #include <mentalEntity.h>
+#include <concept.h>
+#include <user/stimFrame.h>
 
 namespace smo {
 namespace cologex {
@@ -37,14 +39,23 @@ public:
 };
 
 class CombinatorialLogicExpression
-:	public MentalEntity, public logic::Expression
+:	public MentalEntity, public logic::Expression, public Concept
 {
 public:
 
 };
 
+class CombinatorialLogicExpressionSet
+:	public MentalEntity, public Concept
+{
+public:
+	std::vector<
+		std::pair<stim_buff::SimultaneityStamp, CombinatorialLogicExpression>
+	> expressions;
+};
+
 typedef CombinatorialLogicExpression Cologex;
-typedef CombinatorialLogicExpression Clast;
+typedef CombinatorialLogicExpressionSet CologexSet;
 
 } // namespace cologex
 } // namespace smo
diff --git a/smocore/include/concept.h b/smocore/include/concept.h
new file mode 100644
index 0000000..02766f5
--- /dev/null
+++ b/smocore/include/concept.h
@@ -0,0 +1,14 @@
+#ifndef _CONCEPT_H
+#define _CONCEPT_H
+
+namespace smo {
+namespace cologex {
+
+class Concept
+{
+};
+
+} // namespace cologex
+} // namespace smo
+
+#endif // _CONCEPT_H
diff --git a/smocore/include/goal.h b/smocore/include/goal.h
index 3f1933a..690be6b 100644
--- a/smocore/include/goal.h
+++ b/smocore/include/goal.h
@@ -6,7 +6,8 @@
 namespace smo {
 
 class Goal
-: public concepts::Concept {
+: public cologex::Concept
+{
 public:
     Goal() = default;
     ~Goal() = default;
@@ -14,4 +15,4 @@ public:
 
 } // namespace smo
 
-#endif
+#endif // _GOAL_H