Definiton of xinetd configuration fields?

[michaelsanford]

service ftp
{
        disable         = no
        socket_type     = stream
        wait            = no
        user            = root
        server          = /usr/local/sbin/pure-ftpd
        server_args     = -E -c 1 -I 1 -T 55 -u 1
        groups          = yes
        flags           = REUSE
}

I'd like to find out exactly what all those fields mean (well, aside from server, user, and server_args), and what the allowable values are.; not to mention any other fields that mightn't present in this configuration.

I've got a vague idea, but vague doesn't cut the mustard...

It's not in the xinetd manpages. I remember reading the definition in some old Linux book which I've since lost...