loc_id may be a file identifier or a group identifier within that file.

The dataset’s datatype and dataspace are specified by type_id and space_id, respectively. These are the datatype and dataspace of the dataset as it will exist in the file, which may differ from the datatype and dataspace in application memory.

Dataset creation properties are specified in the dataset creation property list dcpl_id. Dataset access properties are specified in the dataset access property list dapl_id.

H5Dcreate_anon returns a new dataset identifier. Using this identifier, the new dataset must be linked into the HDF5 file structure with H5Olink or it will be deleted from the file when the file is closed.

See H5Dcreate for further details and considerations on the use of H5Dcreate and H5Dcreate_anon.

The differences between this function and H5Dcreate are as follows:

• H5Dcreate_anon explicitly includes a dataset access property list. H5Dcreate always uses default dataset access properties.
• H5Dcreate_anon neither provides the new dataset’s name nor links it into the HDF5 file structure; those actions must be performed separately through a call to H5Olink, which offers greater control over linking.

A dataset created with this function should be closed with H5Dclose when the dataset is no longer needed so that resource leaks will not develop.

SUBROUTINE h5dcreate_anon_f(loc_id, type_id, space_id, dset_id, hdferr, &
                            dcpl_id, dapl_id)
  IMPLICIT NONE
  INTEGER(HID_T), INTENT(IN)  :: loc_id   ! File or group identifier. 
  INTEGER(HID_T), INTENT(IN)  :: type_id  ! Datatype identifier. 
  INTEGER(HID_T), INTENT(IN)  :: space_id ! Dataspace identifier.
  INTEGER(HID_T), INTENT(OUT) :: dset_id  ! Dataset identifier. 
  INTEGER, INTENT(OUT) :: hdferr          ! Error code.  
                                          ! 0 on success and -1 on failure
  INTEGER(HID_T), OPTIONAL, INTENT(IN) :: dcpl_id  
                                          ! Dataset creation property list 
                                          ! identifier.
  INTEGER(HID_T), OPTIONAL, INTENT(IN) :: dapl_id  
                                          ! Dataset access property list 
                                          ! identifier.
END SUBROUTINE h5dcreate_anon_f