text: // Copyright (c) 1997-2013 INRIA Sophia-Antipolis (France).
  // All rights reserved.
  
  namespace CGAL
  {
  
  /*!
  \ingroup PkgPeriodic2Triangulation2VertexFaceClasses
  
  The class `Periodic_2_triangulation_vertex_base_2` is a model
  of the concept `Periodic_2TriangulationVertexBase_2` to be used by
  `Triangulation_data_structure_2` to represent vertices of a
  periodic triangulation.
  
  The first one `Traits` is the geometric traits, it is to be
  instantiated by a model of the concept
  `Periodic_2TriangulationTraits_2`. The second argument is the base
  class to which the additional information for the periodic vertex is
  added and should be a model of `TriangulationDSVertexBase_2`
  
  
  \cgalModels `Periodic_2TriangulationVertexBase_2`
  
  \sa `CGAL::Periodic_2_triangulation_face_base_2`
  \sa `CGAL::Triangulation_vertex_base_2`
  \sa `CGAL::Triangulation_vertex_base_with_info_2`
  
  */
  template< >
  class Periodic_2_triangulation_vertex_base_2
  {
  public:
  
  /// @}
  
  }; /* end Periodic_2_triangulation_vertex_base_2 */
  } /* end namespace CGAL */
  