I'm a bit confused on the use of storage on file type.

Is it about the physical storage of the files, as the storageMedium
suggetsed, or is it about locating a file, as the example in page 2-37
contenLocationValue?

There are multiple ways to locate the same file, e.g.:

http://some_html_server/index.html
ftp://some_ftp_server/index.html

These two can actually be the same file on the OS, just resolved by
different services but eventually point to the same file on the storage
medium and can be retrieved by the OS from the same location, e.g.,
/home/some_user/html_public/index.html

I had thought only the method natively used by the storage system should
be used here, rather than different identifiers used by different
services, since they are not directly related to the physical storage.
This is an issue because page 2-35 states:

"The storage composite should be repeated if there are two or more
copies that are identical bit-wise and managed as a unit except for the
medium on which they are stored."

which implies that if it's the same copy and stored on the same medium
(e.g., Hard Disk), then we should not have different contentLocation,
yet:

hdl + hdl:loc.pnp/cph.3b34188 + hard drive

and

URI + http://wwasearch.loc.gov/107th/200212107035 + hard drive

may resolve to the same stroage location.

Am I missing something?

Thanks,

Zhiwu Xie