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Re: [Fwd: Re: [DTB] Datatypes and Built-ins first run to clean up and extend the initial list]

From: Michael Kifer <kifer@cs.sunysb.edu>
Date: Mon, 03 Mar 2008 14:22:51 -0500
To: axel@polleres.net
Cc: Jos de Bruijn <debruijn@inf.unibz.it>, Dave Reynolds <der@hplb.hpl.hp.com>, RIF WG <public-rif-wg@w3.org>
Message-ID: <4621.1204572171@cs.sunysb.edu>


Axel wrote:
>
> > A given IRI is interpreted as some abstract object in a given 
> > interpretation.  I do not understand how a casting function for such 
> > abstract objects can be defined in a meaningful way.
> 
> yes, it seems hairy/impossible to define it properly within the current
> FLD framework, because I can, even if I assume fixed interpretations for
> cast-functions, not "access" the lexical representation from this fixed 
> interpretation...

It seems to me that the problem is with an inappropriate use of IRIs.
You seem to be treating them as a data type, while IRIs are like RDF
resources, and thus are not data types.
Maybe you need to introduce a data type for what you want (not sure).


	--michael  


> ... still, I can implement a system which does exactly the builtin which 
> I have in mind without major troubles... hmmm.
> 
> Axel
> 
> 1. http://xmlns.com/foaf/spec/
> 2. http://www.polleres.net/presentations/20071127-SPARQL++ODBASE2007.pdf
> 
> 
> > best, Jos
> > 
> >>
> >> Axel
Received on Monday, 3 March 2008 20:12:20 GMT

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