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| HDF5 Last Updated on 2026-07-28 The HDF5 Field Guide

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h5i Module Reference
Fortran Identifier (H5I) Interface

This module contains Fortran interfaces for H5I functions. More...

## Functions/Subroutines
subroutine | h5idec_ref_f (obj_id, ref_count, hdferr)
| Decrements the reference count of an ID.
subroutine | h5iget_file_id_f (obj_id, file_id, hdferr)
| Obtains file identifier from the object identifier.
subroutine | h5iget_name_f (obj_id, buf, buf_size, name_size, hdferr)
| Gets a name of an object specified by its identifier.
subroutine | h5iget_ref_f (obj_id, ref_count, hdferr)
| Retrieves the reference count of an ID.
subroutine | h5iget_type_f (obj_id, type, hdferr)
| Retrieves the type of an object.
subroutine | h5iinc_ref_f (obj_id, ref_count, hdferr)
| Increments the reference count of an ID.
subroutine | h5iis_valid_f (id, valid, hdferr)
| Check if an ID is valid without producing an error message.

## Detailed Description

This module contains Fortran interfaces for H5I functions.