RE: [xri] Increased complexity in resolver.

["Steven Churchill" <steven.churchill@xdi.org>]

Gabe,

Here's how the proposal would work I think: an authority that has a global
xref as a synonym may have local delegation beneath it (as in node C in my
diagram) but one cannot resolve "through" the global xref.  That's why I say
that @ootao*west*steve is not a synonym for @ootao+west*steve even though
@ootao*west and @ootao+west are both synonyms.

Thinking about it more, perhaps I was incorrect in my previous email: maybe
the resolver doesn't need to enforce the restriction after all, because the
parser's syntax tree cannot have a top-level local subsegment following a
top-level global xref.

Drummond, is this last statement true, or is there any way -- using parens
or what have you -- to do this?

~ Steve



-----Original Message-----
From: Gabe Wachob [mailto:gabe.wachob@amsoft.net] 
Sent: Friday, April 27, 2007 5:48 PM
To: 'Steven Churchill'; xri@lists.oasis-open.org
Subject: RE: [xri] Increased complexity in resolver.

Steve-

Huh? Maybe because its Friday at almost 6pm, but I'm totally lost. 

Why does the next sub-segment have to be a global xref? 

	-Gabe

> -----Original Message-----
> From: Steven Churchill [mailto:steven.churchill@xdi.org]
> Sent: Friday, April 27, 2007 5:22 PM
> To: xri@lists.oasis-open.org
> Subject: [xri] Increased complexity in resolver.
> 
> 
> (Please refer to increased-complexity-in-authority-graph.doc. This is the
> same one I sent earlier.)
> 
> So the resolver is walking across the top-level subsegments. It encounters
> a
> global xref, so it duly invokes the authority resolution service (of the
> previous subsegment). It gets back an XRD. Now the resolver needs to
> evaluate the type of the next subsegment -- if it's another global xref
> then
> it can continue walking. Else it has to error out.
> 
> I would sure hate to see that type of logic in the resolution spec.
> 
> ~ Steve
> 
> 
> 
> -----Original Message-----
> From: Steven Churchill [mailto:steven.churchill@xdi.org]
> Sent: Wednesday, April 25, 2007 3:33 PM
> To: 'xri@lists.oasis-open.org'
> Subject: FW: [xri] Flat structure for local delegation within global xrefs
> 
> 
> I think I've managed to confused everyone (again) by sending the wrong
> document.
> 
> The attachment increased-complexity-in-authority-graph.doc summarizes my
> discussion with Drummond yesterday. For one thing, I fear that we've
> redefined the meaning of the term "XRI synonym". In the diagram you will
> note that when adding the localID "+west",  @ootao*west is (still) a
> synonym
> for @ootao+west (they resolve to the same XRD), but @ootao*west*steve
> would
> no longer be a synonym for @ootao+west*steve.
> 
> The other attachment (increased-complexity-in-authority-graph-
> flatness.doc)
> talks about the flat structure for local delegation within global xrefs.
> 
> ~ Steve
> 
> 
> 
> ________________________________________
> From: Steven Churchill [mailto:steven.churchill@xdi.org]
> Sent: Wednesday, April 25, 2007 3:22 PM
> To: xri@lists.oasis-open.org
> Subject: [xri] Flat structure for local delegation within global xrefs
> 
> (Blech.)
> 
> Please see attached.
> 
> ~ Steve
>