Often, when deciding how to arrange things, it may make sense to have something in more than one place. You may have a group of "Unix Servers" containing all of your unix servers, and also a group "Web Servers" containing all of your web servers. While you could just monitor the service twice, that just seems silly.
An Alias acts much like a "symlink", allowing the same object to be in more than one place, but still just one object.
Group "Web Servers" { Alias "threemile" "Top:Unix_Servers:threemile" Alias "tarawa" "Top:NT_Servers:tarawa" Alias "matagi" "Top:NT_Servers:matagi" }
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