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RE: A tricky matched values problem
I think that in principle, you should not reduce the quantity of information
supplied to the user unnecessarily. That is, to be user-friendly, "if in
doubt, give more out". Humans have a habit of not being optimal in their
usage of systems.
Obviously if access control prohibits then that's a different matter. But
if there is some doubt, at the end of the day (or the request, which takes
longest) remember that the user is looking for useful information. It is
extremely frustrating if an academically precise interpretation of a filter
just happens to exclude what the user needs, and causes him to have to
submit a second, perhaps more vague, request in order to reach that
information. It gives X.500 a bad name!
That's my pennyworth!
Roger
> ----------
> From: David Chadwick[SMTP:d.w.chadwick@salford.ac.uk]
> Reply To: d.w.chadwick@salford.ac.uk
> Sent: 29 September 1999 12:17
> To: osidirectory@az05.bull.com; ietf-ldapext@netscape.com
> Subject: A tricky matched values problem
>
> Thomas Salter providing the following filter:
>
> (OR(AND(mail=sean.mullan@sun.com)(telephoneNumber=47))(cn=
> Sean*))
>
> to an entry containing the following attributes.
>
> cn: Sean Mullan
> mail: sean.mullan@sun.com
> mail: mullan@east.sun.com
> telephoneNumber: +1 781 442 0926
> telephoneNumber: 555-9999
>
> As you can see, the overall filter is true, the AND is false, but the
> mail attribute value matches true. The question is "does matched
> ValuesOnly apply to the mail attribute or not". ie. should one or two
> mail attribute values be returned.
>
> On the FOR side (one returned value), we have that the AVA was
> true,
> On the AGAINST side, we have that the AVA did not contribute to
> the overall filter matching true.
>
> My first reaction was to say that only one mail value should be
> returned, but whilst drafting the proposed textual addition to X.500 I
> have started to change my mind.
>
> What does anyone else think.
>
> David
>
>
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>
> David Chadwick
> IS Institute, University of Salford, Salford M5 4WT
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> Email D.W.Chadwick@salford.ac.uk
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