ldap and key serving

Dear List,
I would value the advice of the list as to the status of running a LDAP 
based keyserver.
I understood that the gnupg and pgp could interact only with servers 
that used the pgp protocol, like pksd.
I am told that gnupg can access a properly configured LDAP server by 
designating the kerserver using ldap://keyserver.foo.bar
Is this correct? If so, is there a specific schema that is used, and 
does openLDAP handle the job?

Thanks,

Tony Lembke