HDF5 File Image Operations

File image operations allow users to work with HDF5 files in memory in the same ways that users currently
work with HDF5 files on disk. Disk I/O is not required when file images are opened, created, read from, or
written to.

An HDF5 file image is an HDF5 file that is held in a buffer in main memory. Setting up a file image in memory
involves using either a buffer in the file access property list or a buffer in the Core (aka Memory) file driver.

The advantage of working with a file in memory is faster access to the data.