[Yum] server vs. repository?

[Robert P. J. Day]

  there seems to be a subtle but constant confusion between what is a yum
"server" and a yum "repository".  from an earlier doc, i thought a
"repository" was the physical server, and the "server"  was the unique
URL.  so that a repository could handle multiple servers.

  can someone clarify this?  as "man yum.conf" refers to "server" entries
in that file, while http://linux.duke.edu/projects/yum/repos/ refers to
repositories.  this is just the sort of thing that will drive someone
a bit nuts if the terminology keeps bouncing back and forth.

rday