diff --git a/Visibility_2/doc/Visibility_2/CGAL/Rotational_sweep_visibility_2.h b/Visibility_2/doc/Visibility_2/CGAL/Rotational_sweep_visibility_2.h
index 68a80259738..6f580ba1d9b 100644
--- a/Visibility_2/doc/Visibility_2/CGAL/Rotational_sweep_visibility_2.h
+++ b/Visibility_2/doc/Visibility_2/CGAL/Rotational_sweep_visibility_2.h
@@ -39,18 +39,18 @@ public:
 
 /// \name Tags 
 /// @{
-  /*! 
-    Its value is either \ref CGAL::Tag_true or \ref CGAL::Tag_false.
+  /*!
+  \copydoc ::Visibility_2::Regularization_tag
   */
   typedef RegularizationTag Regularization_tag;
   
   /*! 
-    See also \ref Visibility_2::Supports_general_polygon_tag.
+    See \ref Visibility_2::Supports_general_polygon_tag.
   */
   typedef ::Tag_true Supports_general_polygon_tag; 
 
   /*! 
-    See also \ref Visibility_2::Supports_simple_polygon_tag.
+    See \ref Visibility_2::Supports_simple_polygon_tag.
   */
   typedef ::Tag_true Supports_simple_polygon_tag; 
 /// @}
diff --git a/Visibility_2/doc/Visibility_2/CGAL/Simple_polygon_visibility_2.h b/Visibility_2/doc/Visibility_2/CGAL/Simple_polygon_visibility_2.h
index 0a86241677b..cf903c2a0b9 100644
--- a/Visibility_2/doc/Visibility_2/CGAL/Simple_polygon_visibility_2.h
+++ b/Visibility_2/doc/Visibility_2/CGAL/Simple_polygon_visibility_2.h
@@ -45,18 +45,17 @@ public:
 /// \name Tags 
 /// @{
   /*! 
-    Tag identifying whether the regularized visibility area is computed. 
-    Its value is either \ref CGAL::Tag_true or \ref CGAL::Tag_false.
+  \copydoc ::Visibility_2::Regularization_tag
   */
   typedef RegularizationTag Regularization_tag;
   
   /*! 
-    See also \ref Visibility_2::Supports_general_polygon_tag.
+    See \ref Visibility_2::Supports_general_polygon_tag.
   */
   typedef ::Tag_false Supports_general_polygon_tag; 
 
   /*! 
-    See also \ref Visibility_2::Supports_simple_polygon_tag.
+    See \ref Visibility_2::Supports_simple_polygon_tag.
   */
   typedef ::Tag_true Supports_simple_polygon_tag; 
 /// @}
diff --git a/Visibility_2/doc/Visibility_2/CGAL/Triangular_expansion_visibility_2.h b/Visibility_2/doc/Visibility_2/CGAL/Triangular_expansion_visibility_2.h
index 8d7e446e832..67a71faf137 100644
--- a/Visibility_2/doc/Visibility_2/CGAL/Triangular_expansion_visibility_2.h
+++ b/Visibility_2/doc/Visibility_2/CGAL/Triangular_expansion_visibility_2.h
@@ -42,17 +42,17 @@ public:
 /// \name Tags 
 /// @{
   /*! 
-    Its value is either \ref CGAL::Tag_true or \ref CGAL::Tag_false.
+    \copydoc ::Visibility_2::Regularization_tag
   */
   typedef RegularizationTag Regularization_tag;
   
   /*! 
-    See also \ref Visibility_2::Supports_general_polygon_tag.
+    See \ref Visibility_2::Supports_general_polygon_tag.
   */
   typedef ::Tag_true Supports_general_polygon_tag; 
 
   /*! 
-    See also \ref Visibility_2::Supports_simple_polygon_tag.
+    See \ref Visibility_2::Supports_simple_polygon_tag.
   */
   typedef ::Tag_true Supports_simple_polygon_tag; 
 /// @}
diff --git a/Visibility_2/doc/Visibility_2/PackageDescription.txt b/Visibility_2/doc/Visibility_2/PackageDescription.txt
index ce9f7b2f2c7..f45f3bc7291 100644
--- a/Visibility_2/doc/Visibility_2/PackageDescription.txt
+++ b/Visibility_2/doc/Visibility_2/PackageDescription.txt
@@ -8,7 +8,7 @@
 \cgalPkgDescriptionBegin{2D Visibility Computation,PkgVisibility_2Summary}
 \cgalPkgPicture{visibility-teaser-thumbnail.png}
 \cgalPkgSummaryBegin
-\cgalPkgAuthors{Michael Hemmer, Kan Huang, Francisc Bungiu}
+\cgalPkgAuthors{Michael Hemmer, Kan Huang, Francisc Bungiu, Ning Xu}
 \cgalPkgDesc{This package provides several variants to compute 
 the visibility area of a point within polygonal regions in two dimensions.}
 \cgalPkgManuals{Chapter_2D_Visibility_Computation,PkgVisibility_2}