Site names are created as needed. The types of objects that may be named relative to a site name are: user, host, service and fs. For example:
site/alameda/user/mjones names a user mjones at the site alameda.
site/alameda/host/sirius names a machine sirius at the site alameda.
site/alameda/service/printer/Sparc-2 names the printer Sparc-2 at the site alameda.
site/alameda/fs/usr/dist names a file directory usr/dist available in the site alameda.