An Object representing a single conceptual entity which might have multiple File representations.

File Sets describe the conceptual entity that Files are concrete manifestations of. When that entity has multiple manifestations, it may have multiple Files. For example, a page in a book may exist in both Tiff and P·N·G format. These are separate files, but they represent the same conceptual entity, the page.

File Sets do not have members. Typically, they are members of Works.