W3C home > Mailing lists > Public > public-rdf-wg@w3.org > September 2012

Re: Dataset Syntax - checking for consensus

From: Ted Thibodeau Jr <tthibodeau@openlinksw.com>
Date: Wed, 26 Sep 2012 11:33:36 -0400
Cc: public-rdf-wg@w3.org
Message-Id: <7B8CED45-0C1C-4793-8C8A-D89B4BFB9205@openlinksw.com>
To: Sandro Hawke <sandro@w3.org>

On Sep 26, 2012, at 10:14 AM, Sandro Hawke wrote:

> On 09/26/2012 09:42 AM, Kingsley Idehen wrote:
>> On 9/25/12 10:48 PM, Gavin Carothers wrote:
>>> On Tue, Sep 25, 2012 at 7:08 PM, Pat Hayes <phayes@ihmc.us> wrote:
>>>>> PROPOSED: Our dataset syntax will allow for the expression of empty named graphs, whatever their semantics might be (to be decided). The syntax is an empty curly-braces expression, as in "<g> { }".
>>>> +1. However, note that there is only one empty graph: it is unique.
>>> Yes! There is only one empty graph. +1 Pat, now my brain hurts less.
>> +1
> It seems to me that when people say "named graph" they are often (very nearly always) referring to a g-box not a g-snap.

Hm.  That doesn't match my experience, even in the calls in
which we both participate.

I find that "named graph" *often* refers to a g-snap, though 
the person using the term may not realize it -- even when they
do realize that g-box and g-snap are distinct -- until lots of
discussion and misunderstanding has passed.

> When I use the term "named graph", I am intentionally being ambiguous.   So, in fact there are lots distinct empty "named graphs", since they are empty g-snap containers.

I may have many distinct names for the same (immutable) g-snap,
regardless of the number of triples contained therein, 0 or more.

I may have many distinctly named (mutable) g-boxes, which may all 
each contain the same g-snap (whether that is "the" empty g-snap 
or otherwise) at some point in time.


A: Yes.                      http://www.guckes.net/faq/attribution.html
| Q: Are you sure?
| | A: Because it reverses the logical flow of conversation.
| | | Q: Why is top posting frowned upon?

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Received on Wednesday, 26 September 2012 15:34:04 UTC

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