[no subject]

["Mark D. Anderson" <mda@discerning.com>]

Copies to:      	<ietf-ldapext@netscape.com>
Subject:        	Re: Families of Entries
Date sent:      	Mon, 21 Dec 1998 13:30:00 -0800

> it isn't clear to me how this 
> captures the vCard information model (www.imc.org),
> or that of the ldap wpPerson draft.
> syntax aside, those allow keyword properties attached
> to each attribute value:
> 
> phone: 123-1234 (pref $ msg $ work)
> phone: 123-5432 (home $ old)
> phone: 130-4590 (mobile $ work $ msg)
> 
> How would this look as one of your "family tree"s?

Below the person's entry you would have a separate entry for each 
telephone number. The attributes of each telephone number 
(mobile or not, work or not, ex-dir or not etc) are then stored as 
normal attributes in the telephone entry. You can then search for 
telephone numbers that have particular properties, and get the 
matching numbers returned (subject to access controls of course)


> How would ACL's work, so that certain users couldn't see 
> attributes with a "home" property?
> 

They actually would not get access to the home telephone number 
entry. The access controls protecting this entry are set up in just 
the same way that you set up access controls to any entry in the 
DIT. SO for example, a home tel no entry might only be accessible 
to close family and friends and not to people from the office.

> On the implementation side, how would indexing work if I
> want this to be my information model, but I'd like to do
> a search for the person with a certain home city (so the
> search could benefit both from the attribute "l" and from
> the property "home")?
> 

The user would typically specify a FamilyGrouping control of 
upToAncestor and this would allow filtering on all the attributes of 
the person's entry and a telephone number entry as if they were 
combined together.

It is precisely this sort of feature that the PTTs want for their 
directory enquiries service.

Indexes would need to built that combined the indexes of the 
separate entries, for the typical groupings used by the users.

Hope this helps.

David

> -mda
> 
> 
> 


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David Chadwick
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