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Re: BLD: externally defined frames

From: Chris Welty <cawelty@gmail.com>
Date: Tue, 01 Jul 2008 10:14:48 -0400
Message-ID: <486A3BD8.5040203@gmail.com>
To: kifer@cs.sunysb.edu
CC: "Public-Rif-Wg (E-mail)" <public-rif-wg@w3.org>

Michael Kifer wrote:
> The purpose of using external frames is exactly the same as that of using
> external predicates. It is just a different interface. It can be provided for
> external objects, while external predicates is an interface for the regular
> (non-object-oriented) builtin calls.
> I would like to better understand what you and Christian had in mind. From the
> F2F I understood that csma had right understanding of the purpose of that
> feature. If the added wording is not what he expected then maybe it can be
> improved (once I understand what is confusing there).

I didn't quite get what Christian thought it meant, I hadn't thought about it 
deeply but I guess I was expecting (based on your description at the F2F which 
more or less sounded like your 1st para above) that extern(s[p->o]) was 
syntactic sugar for extern(p(s,o)).

I'm not sure what to make of what it actually is, I need time to think about it, 
and would rather not rush a final decision.  Again, the proposal is to leave it 
as is in the BLD LC spec but put it at risk, which gives us some flexibility to 
understand it.


> 	--michael  
> On Fri, 27 Jun 2008 12:05:10 -0400
> Chris Welty <cawelty@gmail.com> wrote:
>> Christian and I read the new text explaining external frames in BLD 
>> [http://www.w3.org/2005/rules/wiki/BLD#Terms] and although we each had a 
>> different understanding of what external frames were, it matched neither, which 
>> is problematic.
>> Given the time constraints I think the only choice is to leave that text as is 
>> but label it at-risk for last call & open an issue.  Then we can discuss it 
>> further during the summer.  We hope to propose and resolve that quickly - I 
>> specifically don't want to get dragged into a lengthy discussion of what 
>> external frames are, just a quick decision to label at risk so we can publish, 
>> and we'll have the lengthy discussion later.
>> -Chris

Dr. Christopher A. Welty                    IBM Watson Research Center
+1.914.784.7055                             19 Skyline Dr.
cawelty@gmail.com                           Hawthorne, NY 10532
Received on Tuesday, 1 July 2008 14:15:30 UTC

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