The FORTRAN 90 API to HDF5
h5r: References

          SUBROUTINE h5rcreate_f(loc_id, name, ref, hdferr) 
            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: loc_id   ! Location identifier 
            CHARACTER(LEN=*), INTENT(IN) :: name   ! Name of the object at location specified
                                                   ! by loc_id identifier 
            TYPE(hobj_ref_t_f), INTENT(OUT) :: ref   ! Object reference 
            INTEGER, INTENT(OUT) :: hdferr         ! Error code 

          END SUBROUTINE h5rcreate_f

          SUBROUTINE h5rcreate_f(loc_id, name, space_id, ref, hdferr) 
            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: loc_id   ! Location identifier 
            CHARACTER(LEN=*), INTENT(IN) :: name   ! Name of the dataset at location specified
                                                   ! by loc_id identifier 
            INTEGER(HID_T), INTENT(IN) :: space_id ! Dataset's dataspace identifier 
            TYPE(hdset_reg_ref_t_f), INTENT(OUT) :: ref ! Dataset region reference 
            INTEGER, INTENT(OUT) :: hdferr         ! Error code 

          END SUBROUTINE h5rcreate_f

          SUBROUTINE h5rdereference_f(dset_id, ref, obj_id, hdferr) 
            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: dset_id   ! Dataset identifier 
            TYPE(hobj_ref_t_f), INTENT(IN) :: ref   ! Object reference 
            INTEGER(HID_T), INTENT(OUT) :: obj_id   ! Object identifier 
            INTEGER, INTENT(OUT) :: hdferr         ! Error code 

          END SUBROUTINE h5rdereference_f

          SUBROUTINE h5rdereference_f(dset_id, ref, obj_id, hdferr) 
            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: dset_id   ! Dataset identifier 
            TYPE(hdset_reg_ref_t_f), INTENT(IN) :: ref   ! Object reference 
            INTEGER(HID_T), INTENT(OUT) :: obj_id   ! Object identifier 
            INTEGER, INTENT(OUT) :: hdferr          ! Error code 
          
          END SUBROUTINE h5rdereference_f

          SUBROUTINE h5rget_region_f(dset_id, ref, space_id, hdferr) 
            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: dset_id   ! Dataset identifier 
            TYPE(hdset_reg_ref_t_f), INTENT(IN) :: ref   ! Dataset region reference 
            INTEGER(HID_T), INTENT(OUT) :: space_id   ! Space identifier 
            INTEGER, INTENT(OUT) :: hdferr          ! Error code
 
          END SUBROUTINE h5rget_region_f

          SUBROUTINE h5rget_object_type_f(dset_id, ref, obj_type, hdferr) 
            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: dset_id   ! Dataset identifier 
            TYPE(hobj_ref_t_f), INTENT(IN) :: ref   ! Object reference 
            INTEGER, INTENT(OUT) :: obj_type   ! Object type  
                                               !  H5G_UNKNOWN_F     (-1)
                                               !  H5G_LINK_F         0
                                               !  H5G_GROUP_F        1
                                               !  H5G_DATASET_F      2
                                               !  H5G_TYPE_F         3

            INTEGER, INTENT(OUT) :: hdferr          ! Error code 

          END SUBROUTINE h5rget_object_type_f