RE: [xdi] How to get from =markus/+email to the actual data

["Barnhill, William [USA]" <barnhill_william@bah.com>]

Could this be solved by specifying a reserved i-name (might need to deal with them if someone has registered it already) of =anon or =unknown or some such?

 

Then a message from =giovanni is : =giovanni/$get//=markus/+email

and a message from an anonymous sender is =anon/$get//=markus/+email

 

The reasoning behind this is that =anon is still a valid invidivual i-name as i-names specify an individual identity and I think the anonymous user is an identity, in the same way that the null set is a special kind of set.

 

Bill

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From: markus.sabadello@gmail.com [markus.sabadello@gmail.com] On Behalf Of Markus Sabadello [markus.sabadello@xdi.org]
Sent: Monday, October 05, 2009 4:50 AM
To: Giovanni Bartolomeo
Cc: Drummond Reed; OASIS - XDI TC
Subject: Re: [xdi] How to get from =markus/+email to the actual data

Yes I guess that's still kind of an open question.. You're right, if =giovanni is sending the message, then you would do
=giovanni/$get//=markus/+email

But sometimes you don't have a sender authority, or you want the sender to be anonymous. I'm not sure if we ever talked about this situation... I'm usually using "$" for an "anonymous" sender. Maybe there are better ideas?

Markus

On Mon, Oct 5, 2009 at 9:22 AM, Giovanni Bartolomeo <giovanni.bartolomeo@uniroma2.it> wrote:

Hello, one simple question regarding the subject "$" in the statement

$/$get//=markus/+email

is "$" referring to the authority which originates this message? E.g. if I'd be that authority, would the above statement be the same as

=giovanni/$get//=markus/+email

?

Thanks,
Giovanni

Def. Quota "Drummond Reed" <drummond.reed@cordance.net>:

On Thu, Oct 1, 2009 at 1:38 PM, Markus Sabadello
<markus.sabadello@xdi.org>wrote:

Hello XDI TC,

Someone asked me a question about the XDI4j library in Higgins and about
how XDI endpoints relate to XRI resolution. So I put together some commented
sample code which uses OpenXRI and XDI4j:
http://wiki.eclipse.org/XDI4j_Tutorial_6

The task is, given an XRI such as =markus/+email and nothing else, how do
you actually find and read the value (the e-mail address)?

Step by step, the code does the following:
1. It resolves the authority part of the XRI (=markus) using standard XRI
resolution with an XDI service type, i.e. it looks for an XDI endpoint in
the i-name's XRD.
2. After discovering that endpoint, it prepares and sends an XDI message
which looks like this:
$
  $get
     /
        =markus
           +email
3. The XDI endpoint answers with the statement that matches the $get query:
=markus
  +email
     "markus.sabadello@gmail.com"
4. In the end, the code prints out the literal from that statement.

In total, a few simple lines of actually working code that should
demonstrate how XRI and XDI work together.

Markus

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