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Re: Consts/CURIEs in PS (was Re: DTB status (on today's agenda) )

From: Jos de Bruijn <jos.debruijn@deri.org>
Date: Tue, 06 May 2008 10:27:38 +0200
Message-ID: <4820167A.6030207@deri.org>
To: Michael Kifer <kifer@cs.sunysb.edu>
CC: Sandro Hawke <sandro@w3.org>, Axel Polleres <axel.polleres@deri.org>, "Public-Rif-Wg (E-mail)" <public-rif-wg@w3.org>



Michael Kifer wrote:
> Cool!
> 
> There is only one little thing. Right now the spec allows "aliases" for
> symbol space names. Those aliases are not required to be IRIs (otherwise I
> do not see a purpose for them). So, something like
> 
> "abc"^^foobar&>%$
> 
> is also possible (in principle). It would be wrong to write it as 
> 
> "abc"^^<foobar&>%$>
> 
> since foobar&>%$ is not an iri.
> 
> On the other hand, I do not see those aliases as terribly useful in any
> form or shape. I included them because Jos wanted them. So, I would be
> perfectly happy to throw them out.

I think there was a misunderstanding.  I was only advocating the 
possibility of having aliases that are also IRIs.  (the reason for 
allowing aliases is compatibility with other semantic Web languages)

Best, Jos

> 
> 
> 	--michael
> 
> 
>> Okay, I think I see a consensus here (more or less proposed by Jos and
>> Michael at different times):
>> (1) "foo"^^<bar>
>>
>> This is the normal, full syntax for constants.  For example:
>>
>>     "http://purl.org/dc/terms/creator"^^<http://www.w3.org/2007/rif#iri>
>>
>> (2)  foo:bar    
>>
>> is shorthand for
>>
>>     "expand(foo)bar"^^<http://www.w3.org/2007/rif#iri>
>>
>> except on the right-hand-side of a ^^.
>>
>> (3) "foo"^^bar:baz
>>
>> is shorthand for
>>
>>     "foo"^^<expand(bar)baz>
>>
>> This means that the CURIE syntax (a:b) is context sensitive; it's read
>> differently on the right-hand-side of ^^.
>>
>> (4) <foo>
>>
>> This is not allowed.  The pointy-brackets are only allowed as part of
>> the ^^ construct. Maybe someday we can figure out a way to allow it, but
>> right now it has problems.
>>
>> (5) "foo"^^bar
>>
>> is allowed for aliasing (I don't quite follow this), but doesn't
>> interact with the above.
>>
>> ================================================================
>>
>> If I'm understanding everyone correctly, we can all live with that.
>> Yes?
>>
>>      -- Sandro
>>
>>
>>
> 
> 
> 

-- 
Jos de Bruijn            debruijn@inf.unibz.it
+390471016224         http://www.debruijn.net/
----------------------------------------------
An expert is a person who has made all the
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Received on Tuesday, 6 May 2008 08:27:38 GMT

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