! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
!   Copyright by The HDF Group.                                               *
!   Copyright by the Board of Trustees of the University of Illinois.         *
!   All rights reserved.                                                      *
!                                                                             *
!   This file is part of HDF5.  The full HDF5 copyright notice, including     *
!   terms governing use, modification, and redistribution, is contained in    *
!   the COPYING file, which can be found at the root of the source code       *
!   distribution tree, or in https://www.hdfgroup.org/licenses.               *
!   If you do not have access to either file, you may request a copy from     *
!   help@hdfgroup.org.                                                        *
! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
!
!
! The following example code shows how to create groups
! using absolute and relative names. It creates three groups:
! the first two groups are created using the file identifier and
! the group absolute names, and the third group is created using
! a group identifier and the name relative to the specified group.
!
! This example is used in the HDF5 Tutorial.

PROGRAM H5_CRTGRPAR

  USE HDF5 ! This module contains all necessary modules

  IMPLICIT NONE

  CHARACTER(LEN=10), PARAMETER :: filename = "groupsf.h5" ! File name
  CHARACTER(LEN=8),  PARAMETER :: groupname1 = "/MyGroup" ! Group name
  CHARACTER(LEN=16), PARAMETER :: groupname2 = "/MyGroup/Group_A"
                                                          ! Group name
  CHARACTER(LEN=7),  PARAMETER :: groupname3 = "Group_B"  ! Group name

  INTEGER(HID_T) :: file_id       ! File identifier
  INTEGER(HID_T) :: group1_id, group2_id, group3_id ! Group identifiers

  INTEGER     ::   error ! Error flag
  !
  ! Initialize FORTRAN interface.
  !
  CALL h5open_f(error)

  !
  ! Create a new file using default properties.
  !
  CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file_id, error)

  !
  ! Create group "MyGroup" in the root group using absolute name.
  !
  CALL h5gcreate_f(file_id, groupname1, group1_id, error)

  !
  ! Create group "Group_A" in group "MyGroup" using absolute name.
  !
  CALL h5gcreate_f(file_id, groupname2, group2_id, error)

  !
  ! Create group "Group_B" in group "MyGroup" using relative name.
  !
  CALL h5gcreate_f(group1_id, groupname3, group3_id, error)

  !
  ! Close the groups.
  !
  CALL h5gclose_f(group1_id, error)
  CALL h5gclose_f(group2_id, error)
  CALL h5gclose_f(group3_id, error)

  !
  ! Terminate access to the file.
  !
  CALL h5fclose_f(file_id, error)

  !
  ! Close FORTRAN interface.
  !
  CALL h5close_f(error)

END PROGRAM H5_CRTGRPAR
