diff --git a/Kernel_23/doc/Kernel_23/CGAL/Dimension.h b/Kernel_23/doc/Kernel_23/CGAL/Dimension.h
index 672a5f8acbe..24bd632afdc 100644
--- a/Kernel_23/doc/Kernel_23/CGAL/Dimension.h
+++ b/Kernel_23/doc/Kernel_23/CGAL/Dimension.h
@@ -38,7 +38,7 @@ public:
 
 /*! 
 The dimension value as a compile-time 
-integral constant. It is implemented as `K::Dimension<T>::type::value`. 
+integral constant. It is implemented as \link Dimension_tag::value K::Ambient_dimension<T>::type::value \endlink. 
 It exists only when the dimension is a compile-time constant. 
 */ 
 static const int value; 
@@ -51,7 +51,7 @@ static const int value;
 /*! 
 Either `Dimension_tag<dim>` if the dimension is a 
 compile-time constant of value `dim`, or `Dynamic_dimension_tag` 
-otherwise. It is implemented as `K::Ambient_dimension<T>::type`. 
+otherwise. It is implemented as \link Kernel::Ambient_dimension::type K::Ambient_dimension<T>::type \endlink. 
 */ 
 typedef Hidden_type type; 
 
@@ -167,7 +167,7 @@ public:
 
 /*! 
 The dimension value as a compile-time 
-integral constant. It is implemented as `K::Feature_dimension<T>::type::value`. 
+integral constant. It is implemented as \link Dimension_tag::value K::Feature_dimension<T>::type::value \endlink. 
 It exists only when the dimension is a compile-time constant. 
 */ 
 static const int value; 
@@ -180,7 +180,7 @@ static const int value;
 /*! 
 Either `Dimension_tag<dim>` if the dimension is a 
 compile-time constant of value `dim`, or `Dynamic_dimension_tag` 
-otherwise. It is implemented as `K::Feature_dimension<T>::type`. 
+otherwise. It is implemented as \link Kernel::Feature_dimension::type K::Feature_dimension<T>::type \endlink. 
 */ 
 typedef Hidden_type type; 
 
diff --git a/Kernel_23/doc/Kernel_23/Concepts/Kernel.h b/Kernel_23/doc/Kernel_23/Concepts/Kernel.h
index c479be6ab1a..fdd0b0081f3 100644
--- a/Kernel_23/doc/Kernel_23/Concepts/Kernel.h
+++ b/Kernel_23/doc/Kernel_23/Concepts/Kernel.h
@@ -9281,6 +9281,38 @@ typedef Hidden_type Angle;
 
 /// @} 
 
+/// \name Dimension handling
+/// @{
+
+
+/*!
+A class to extract the ambient dimension for each object listed in the <b>Geometric Object</b> section of the Kernel concept.
+*/
+template <class T>
+class Ambient_dimension
+{
+  public:
+  /*!
+    `dim` is the ambient dimension of the geometric object `T`.
+  */
+  typedef Dimension_tag<dim> type;
+};
+
+/*!
+A class to extract the feature dimension for each object listed in the <b>Geometric Object</b> section of the Kernel concept.
+*/
+template <class T>
+class Feature_dimension
+{
+  public:
+  /*!
+    `dim` is the feature dimension of the geometric object `T`.
+  */
+  typedef Dimension_tag<dim> type;
+};
+
+/// @}
+
 /// \name Constants 
 /// @{