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diff --git a/Carpet/Carpet/src/variables.hh b/Carpet/Carpet/src/variables.hh
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+// $Header: /home/eschnett/C/carpet/Carpet/Carpet/Carpet/src/variables.hh,v 1.5 2004/05/21 18:16:23 schnetter Exp $
+
+// It is assumed that each group has at least one map.  All arrays
+// have exactly one map.  All maps have the same number of refinement
+// levels.
+
+// It is assumed that each group has at least one component.
+
+// It is assumed that the number of components of all arrays is equal
+// to the number of components of the grid functions, and that their
+// distribution onto the processors is the same, and that all
+// processors own the same number of components.
+
+#ifndef VARIABLES_HH
+#define VARIABLES_HH
+
+#include <vector>
+
+#include "cctk.h"
+
+#include "data.hh"
+#include "dh.hh"
+#include "ggf.hh"
+#include "gh.hh"
+#include "operators.hh"
+#include "th.hh"
+#include "vect.hh"
+
+#include "carpet_public.h"
+#include "defines.hh"
+
+
+
+namespace Carpet {
+  
+  using namespace std;
+  
+  
+  
+  // Handle from CCTK_RegisterGHExtension
+  extern int GHExtension;
+  
+  // Maximum number of refinement levels
+  extern int maxreflevels;
+  
+  // Refinement levels
+  extern int reflevels;
+  
+  // Refinement factor
+  extern int reffact;
+  
+  // Refinement factor on finest possible grid
+  extern int maxreflevelfact;
+  
+  // Base multigrid level
+  extern int basemglevel;
+  
+  // Multigrid levels
+  extern int mglevels;
+  
+  // Multigrid factor
+  extern int mgfact;
+  
+  // Multigrid factor on coarsest grid
+  extern int maxmglevelfact;
+  
+  // Maps
+  extern int maps;
+  
+  
+  
+  // Current position on the grid hierarchy
+  extern int reflevel;
+  extern int mglevel;
+  extern int map;
+  extern int component;
+  
+  // Current refinement factor
+  extern int reflevelfact;
+  
+  // Current multigrid factor
+  extern int mglevelfact;
+  
+  
+  
+  // Carpet's GH
+  extern CarpetGH carpetGH;
+  
+  
+  
+  // Times and spaces on the refinement levels
+  extern CCTK_REAL global_time;
+  extern vector<vector<CCTK_REAL> > leveltimes; // [mglevel][reflevel]
+  extern CCTK_REAL delta_time;
+  
+  extern vector<vect<CCTK_REAL,dim> > origin_space; // [mglevel]
+  extern vect<CCTK_REAL,dim> delta_space;
+  
+  
+  
+  // Is this the time for a global mode call?
+  extern bool do_meta_mode;
+  extern bool do_global_mode;
+  
+  // Is prolongation enabled?
+  extern bool do_prolongate;
+  
+  
+  
+  // Data for grid functions
+  
+  // The grid hierarchy
+  extern vector<gh<dim>*> vhh;  // [map]
+  extern vector<dh<dim>*> vdd;  // [map]
+  extern vector<th<dim>*> vtt;  // [map]
+  
+  // Data for the groups
+  struct groupdesc {
+    cGroupDynamicData info;
+    operator_type transport_operator; // prolongation and restriction
+  };
+  extern vector<groupdesc> groupdata; // [group]
+  
+  // Data for everything
+  struct arrdesc {
+    // points to hh etc. for GF, and is unique for SCALAR and ARRAY
+    gh<dim>* hh;
+    dh<dim>* dd;
+    th<dim>* tt;
+    vector<ggf<dim>*> data;     // [var]
+  };
+  extern vector<vector<arrdesc> > arrdata; // [group][map]
+  
+} // namespace Carpet
+
+#endif // !defined(VARIABLES_HH)