$vOBJ->{VGROUP} = {
                    'dim1' => {
                                'parents' => {
                                               'montest.HDF' => 10,
                                               'myData' => 9
                                             },
                                'class' => 'Dim0.0',
                                'attach' => {
                                              'dim1' => {
                                                          'class' => 'DimVal0.1',
                                                          'type' => 'VData',
                                                          'ref' => 4
                                                        }
                                            },
                                'ref' => 5
                              },
                    'montest.HDF' => {
                                       'childs' => {
                                                     'dim1' => 5,
                                                     'myData' => 9,
                                                     'dim2' => 7
                                                   },
                                       'class' => 'CDF0.0',
                                       'ref' => 10
                                     },
                    'myData' => {
                                  'parents' => {
                                                 'montest.HDF' => 10
                                               },
                                  'childs' => {
                                                'dim1' => 5,
                                                'dim2' => 7
                                              },
                                  'class' => 'Var0.0',
                                  'attach' => {
                                                'myData' => {
                                                              'type' => 'SDS_Data',
                                                              'ref' => 2
                                                            }
                                              },
                                  'ref' => 9
                                },
                    'dim2' => {
                                'parents' => {
                                               'montest.HDF' => 10,
                                               'myData' => 9
                                             },
                                'class' => 'Dim0.0',
                                'attach' => {
                                              'dim2' => {
                                                          'class' => 'DimVal0.1',
                                                          'type' => 'VData',
                                                          'ref' => 6
                                                        }
                                            },
                                'ref' => 7
                              }
                  };