Re: [xdi] RE: [External] [xdi] Multiplicity questions

[Michael Schwartz <mike@gluu.org>]

That seems like a good optional feature. To require behavior this would be 
hugely expensive for oxServer, where we'd have to do LDAP RDN changes. I 
think its a nice optional feature for some servers to implement...

- Mike


On Tue, 3 Jul 2012, Barnhill, William [USA] wrote:

> If you are talking ordinal #s then taking this...
> =markus$*(+email)$!1/!/(data:,aaa)
> =markus$*(+email)$!2/!/(data:,bbb)
> =markus$*(+email)$!3/!/(data:,ccc)
> Deleting the second one would give you:
> =markus$*(+email)$!1/!/(data:,aaa)
> =markus$*(+email)$!2/!/(data:,ccc)
> Then adding a new one would give you:
> =markus$*(+email)$!1/!/(data:,aaa)
> =markus$*(+email)$!2/!/(data:,ccc)
> =markus$*(+email)$!3/!/(data:,ddd)
>
>
>
> From: xdi@lists.oasis-open.org [mailto:xdi@lists.oasis-open.org] On Behalf Of Markus Sabadello
> Sent: Monday, July 02, 2012 1:21 PM
> To: OASIS - XDI TC
> Subject: [External] [xdi] Multiplicity questions
>
> Example:
>
> =markus$*(+email)$!1/!/(data:,aaa)
> =markus$*(+email)$!2/!/(data:,bbb)
> =markus$*(+email)$!3/!/(data:,ccc)
>
> I was wondering.. If you first delete let's say the $!2 value, and then add a new value, does the $!2 get recycled?
> Or does the counter always keep going up, i.e. $!4 would be issued, even if $!2 is unused?
>
> I think I-Numbers should not be recycled for new values, and new ones should always be issued.
>
> So, I think an extra statement should be introduced to remember the I-Number of the last value:
>
> =markus$*(+email)/$!/$!3   <-- last I-Number
>
> With this statement it gets much easier and more efficient for the server to add a new value of +email.
>
> Or perhaps it would be even better to used GUID-style I-Numbers, then the question of increasing the counter becomes obsolete.
> Or perhaps the spec should not specify this, i.e. you could either use sequential I-Numbers, or GUID-style ones, whatever you prefer.
>
> At XDI2 we need this for implementing link contracts and the policy context nodes, which use the multiplicity format.
>
> If this looks right, I'll create a Proposal page.
>
> Markus