diff --git a/TDS_2/doc/TDS_2/Concepts/TriangulationDSFaceBase_2.h b/TDS_2/doc/TDS_2/Concepts/TriangulationDSFaceBase_2.h
index db4d467238e..4d17e03cf52 100644
--- a/TDS_2/doc/TDS_2/Concepts/TriangulationDSFaceBase_2.h
+++ b/TDS_2/doc/TDS_2/Concepts/TriangulationDSFaceBase_2.h
@@ -4,7 +4,7 @@
 \cgalConcept
 
 The concept `TriangulationDSFaceBase_2` describes the requirements for 
-the base face of a `CGAL::Triangulation_data_structure_2<Vb,Fb>`. 
+the face base class of a `CGAL::Triangulation_data_structure_2<Vb,Fb>`.
 
 Note that if the `CGAL::Triangulation_data_structure_2` 
 is plugged into a triangulation class, 
@@ -30,7 +30,7 @@ In order
 to break the cycle, the base classes for faces and vertices 
 which are plugged in to instantiate a 
 `CGAL::Triangulation_data_structure_2` 
-use a `void` as triangulation 
+use  `void` as triangulation
 data structure parameter. Then, 
 the `CGAL::Triangulation_data_structure_2` 
 uses a <I>rebind</I> mechanism (similar to the one specified in 
@@ -46,6 +46,8 @@ that the `CGAL::Triangulation_data_structure_2`
 actually uses as a base class for the class 
 `CGAL::Triangulation_data_structure_2::Face`. 
 
+\cgalRefines `TriangulationDataStructure_2::Face`
+
 \cgalHasModel `CGAL::Triangulation_ds_face_base_2<Tds>`
 \cgalHasModel `CGAL::Triangulation_face_base_2<Traits,Fb>` 
 \cgalHasModel `CGAL::Regular_triangulation_face_base_2<Traits,Fb>` 
diff --git a/TDS_2/doc/TDS_2/Concepts/TriangulationDSVertexBase_2.h b/TDS_2/doc/TDS_2/Concepts/TriangulationDSVertexBase_2.h
index f84d6af8845..35245d1a609 100644
--- a/TDS_2/doc/TDS_2/Concepts/TriangulationDSVertexBase_2.h
+++ b/TDS_2/doc/TDS_2/Concepts/TriangulationDSVertexBase_2.h
@@ -4,16 +4,16 @@
 \cgalConcept
 
 The concept `TriangulationDSVertexBase_2` describes the requirements for the 
-vertex base class of a `CGAL::Triangulation_data_structure_2<Vb,Fb>`. 
+vertex base class of a `CGAL::Triangulation_data_structure_2<Vb,Fb>`.
 
 Note that if the `CGAL::Triangulation_data_structure_2` 
 is plugged into a triangulation class, 
-the vertex base class has additional geometric 
+the vertex base class may have additional geometric 
 requirements depending on the triangulation class. 
 
 At the base level, 
 provides access to one of its incident 
-face through a `Face_handle`. 
+faces through a `Face_handle`. 
 
 Since the `CGAL::Triangulation_data_structure_2` is the class 
 which defines the handle 
@@ -26,7 +26,7 @@ In order
 to break the cycle, the base classes for faces and vertices 
 which are plugged in to instantiate a 
 `Triangulation_data_structure_2` 
-use a `void` as triangulation 
+use  `void` as triangulation 
 data structure parameter. Then, 
 the `CGAL::Triangulation_data_structure_2` 
 uses a <I>rebind</I> mechanism (similar to the one specified in