RE: Uniqueness of attribute values

[Luca VEZZADINI <GVEZZADINI@businessobjects.com>]

In other words, we are saying that the LDAP specifications do not include
support for anything like that. It's more up to the single implementation to
offer it as an extra feature. Which poses problems in terms of portability,
though, not being a standard.
Does anybody know if this has been raised for future versions of the
protocol? I don't seem to find anything about it, not even on the IETF site.

Thanks,

    Luca

 -----Original Message-----
From: 	John Kristian [mailto:kristian@netscape.com] 
Sent:	Thursday, October 07, 1999 6:50 PM
To:	Luca VEZZADINI
Cc:	openldap-general@OpenLDAP.org
Subject:	Re: Uniqueness of attribute values

An LDAP server can enforce such a constraint.  For example, Netscape
Directory Server is easily configurable, to do this (it's a preoperation
plugin 'uid-plugin', in slapd.ldbm.conf).  In OpenLDAP, it would require
non-trivial programming, I imagine (as far as I know, no similar plugin is
available for the OpenLDAP server).

Luca VEZZADINI wrote:

> Is there any way to enforce uniqueness on any attribute in an LDAP entry?
> As far as I know, the DN is unique by
> definition, but all the other attributes cannot be. So, for example, I can
> have the same uid or e-mail address for two users that are in different
> branches of my organization.
>
> Is there any way for example to force the uid attribute of the user
> objectclass to be unique across the whole directory tree?