RE: [UCR] The Use Case previously known as publication

Hi Chris,

> The word "intensional" is being used in a way that I am 
> unfamiliar with.  The text seems to imply that intensional == 
> implicit (which is isn't), and is contrasted with "factual" 
> which is equated with "extensional" (which it also isn't).  

The use case is heavily based on Axel's
http://www.w3.org/2005/rules/wg/wiki/UCR/Candidate_Use_Cases_for_2nd_Dra
ft/PublicationAlternative

and the intensional vs. extensional distinction came from there. Axel
explained it in an earlier email as:

  This goes along with the notion in deductive databases to distinguish
  between extensional (facts) and intensional (rules) knowledge.


> The text also seems to imply that e.g. "Every science fiction 
> movie is a movie" is implicit and intensional - but the mere 
> fact of saying it makes it explicit, so I'm really not sure 
> what you mean.

Well, "Every science fiction movie is a movie" *is* implicit, until
being made explicit by rules...

> Unless I'm missing something, this does not correspond to any 
> meaning I know, or can find, of intensional (or extensional, 
> for that matter).  I don't think "intensional" or "implicit" 
> is what you want here, so I suggest not confusing a reader 
> with obscure terminology that is used incorrectly. 

Whether used correctly or not, I agree that it's probably not necessary
to the use case. 

> To be constructive, how about something like, "Publishing 
> rules for interlinked metadata"

I'd be fine with this, but let's see what Axel has to say.

David


> -----Original Message-----
> From: public-rif-wg-request@w3.org 
> [mailto:public-rif-wg-request@w3.org] On Behalf Of Chris Welty
> Sent: Monday, June 26, 2006 11:05 PM
> To: Public-Rif-Wg (E-mail)
> Subject: [UCR] The Use Case previously known as publication
> 
> 
> 
> Specific comments on the new text for Use Case 2.10:
> 
> The word "intensional" is being used in a way that I am 
> unfamiliar with.  The text seems to imply that intensional == 
> implicit (which is isn't), and is contrasted with "factual" 
> which is equated with "extensional" (which it also isn't).  
> The text also seems to imply that e.g. "Every science fiction 
> movie is a movie" is implicit and intensional - but the mere 
> fact of saying it makes it explicit, so I'm really not sure 
> what you mean.
> 
> Unless I'm missing something, this does not correspond to any 
> meaning I know, or can find, of intensional (or extensional, 
> for that matter).  I don't think "intensional" or "implicit" 
> is what you want here, so I suggest not confusing a reader 
> with obscure terminology that is used incorrectly. 
> 
> I realize "intensional" is a fairly slippery concept, and I 
> don't want to get the WG bogged down in defining it.
> 
> To be constructive, how about something like, "Publishing 
> rules for interlinked metadata"
> 
> -Chris
> 
> -- 
> Dr. Christopher A. Welty                    IBM Watson Research Center
> +1.914.784.7055                             19 Skyline Dr.
> cawelty@frontiernet.net                     Hawthorne, NY 10532
> http://www.research.ibm.com/people/w/welty
> 
> 
> 
>

Received on Tuesday, 27 June 2006 13:15:42 UTC