Namespace names and fragment identifiers

Hi, all!

I haven't had time to read or post for quite a while, but I just got a 
namespaces question (sorry) in my inbox and wanted to verify that my 
answer is correct. In particular:

Are fragment identifiers significant in namespace names? That is, do 
http://www.foo.org/bar and http://www.foo.org/bar# identify different 
namespaces?

I believe they do, since:

1) Namespace names are URI (IRI) references.
2) URI (IRI) references allow fragment identifiers.
3) Namespace names are identical only if they match character for character.

Thanks,

-- Ron