HDF5 Fortran library documentation includes the following:

- HDF5 Fortran User Notes
- HDF5 Fortran Datatypes, Flags and Functions
- HDF5 C/Fortran Reference Manual
- New Features in the HDF5 Fortran Library: Adding Support for the Fortran 2003 Standard (PDF only)
- Examples

**Regarding Fortran environments:**

The HDF5 Fortran library requires a Fortran 2003 environment in HDF5-1.10. If the Fortran compiler being used is Fortran 2003 compliant and the installed HDF5 library was configured with the `--enable-fortran`

option, then the resulting HDF5 Fortran library will include the *Fortran 2003 environment*.

Both Fortran 90 and Fortran 2003 environments are available. A small number of features are available only in Fortran 2003 environments, but most are available in both. The `--enable-fortran2003`

flag must be specifically included in addition to the`--enable-fortran`

option, in order to provide a *Fortran 2003 environment*. Without this option, the resulting HDF5 Fortran library uses a *Fortran 90 environment*.

**Regarding the HDF5 C/Fortran Reference Manual:**

Throughout the reference manual, each Fortran subroutine description is presented alongside the corresponding C function description.

- Subroutines labeled
*Fortran 90*, with no Fortran 2003 counterpart, are available in both Fortran 90 and Fortran 2003 environments. - Subroutines labeled
*Fortran 2003*, with no Fortran 90 counterpart, are available only in Fortran 2003 environments. - If both Fortran 90 and Fortran 2003 versions of a subroutine are presented, use the version appropriate to the Fortran environment in which the application will be used.