RE: changes on rdf:text on the remaining Ed notes

Hello,

Perhaps I'm adding to the confusion, but I'll give it a shot: if we are defining
an rdf:text datatype, why don't we add the functions into the rdf: namespace?

Regards,

	Boris

> -----Original Message-----
> From: public-rdf-text-request@w3.org [mailto:public-rdf-text-request@w3.org]
> On Behalf Of Axel Polleres
> Sent: 06 April 2009 10:10
> To: Ian Horrocks
> Cc: Sandro Hawke; Alan Ruttenberg; Phillips, Addison; Jos de Bruijn; Jie Bao;
> public-rdf-text@w3.org; team-rif-chairs@w3.org; team-owl-chairs@w3.org
> Subject: Re: changes on rdf:text on the remaining Ed notes
> 
> Ian Horrocks wrote:
> > Alex,
> ^^^^^^ Axel ;-)
> 
> > I wonder if it isn't an unnecessary burden on OWL and RIF to be trying
> > to define stuff which is not relevant to either OWL or (if I understand
> > you correctly) RIF. From what you say, these functions are for possible
> > use by future XPath/XQuery implementations that support rdf:text. But in
> > this case, couldn't/shouldn't we remove them from this spec and leave it
> > up to a/the XPath/XQuery WG to come up with a suitable design?
> >
> > Ian
> 
> The rationale is: RIF built-ins are to a large extent just adaptions of
> the respective XPath/XQuery built-ins. That way, an XPath/Xquery library
> should be re-usable for RIF implementations. In XPath/Xquery there is
> functions and operators defined for the primitive datatypes. What we do
> is a new primitive datatype, and as such, I suggest to have a set of
> basic functions and ops defined in that same way, re-sable for RIF, as
> well as for extensiond of XML query languages. In my opinion, as
> definers of the datatype, this is well inside our scope.
> If we do it in a RIF-only way, I personally think it is too narrow.
> 
> Also, it seems we are there already, the only thing missing being a
> namespace. Something like
> 
> rdftfn: http://www.w3.org/2009/rdftext-functions
> 
> would be fine, it seems.
> 
> 
> 
> 
> 
> >
> >
> >
> > On 5 Apr 2009, at 22:33, Axel Polleres wrote:
> >
> >> Sandro Hawke wrote:
> >>>> Alan Ruttenberg wrote:
> >>>>> Hi Axel,
> >>>>>
> >>>>> What are the plans for the namespace for these functions? I'm
> >>>>> concerned any resolution of that will delay publication of the
> >>>>> document, and OWL plans to go to CR in the not to distant future and
> >>>>> has a dependency on it I'd like to minimize risk on that.
> >>>>>
> >>>>> Have you considered moving these functions out of the rdf:text
> >>>>> specification and into RIF instead?
> >>>> I am reluctant on this one, to be honest: These functions are not
> >>>> RIF-functions but XQuery/XPath style functions. So, I don't see why
> >>>> and in which RIF spec they should go.
> >>>>
> >>>> I agree that "hijacking" the fn namespace is problematic. Can we
> >>>> give it our own namespace? e.g. analogously to
> >>>>
> >>>> fn: http://www.w3.org/2005/xpath-functions
> >>>>
> >>>> we could use
> >>>>
> >>>> rdftfn: http://www.w3.org/2009/rdftext-functions
> >>>>
> >>>> That would be the simplest solution, IMO.
> >>> How awkward would to be to leave this undefined?  These URLs are never
> >>> used in RIF, and before they could be used in XPath, they'd have to be
> >>> adopted by the appropriate WGs, which could put them into the 2005
> >>> namespace, I think.  (Or maybe not -- I don't know the XPath
> >>> extensibility story.  Do any of us know how these URLs are supposed to
> >>> be used?)
> >>
> >> I guess by future XPath/XQuery implementations that support rdf:text?
> >> Not sure, but I'd definitly find it awkward to leave it open, i.e.
> >> you'd suggest to have a standard document which is inherently
> >> incomplete and says, that future standards will complete it (by
> >> defining the resp. namespace)?
> >>
> >> Axel
> >>
> >>>     -- Sandro
> >>
> >>
> >> --
> >> Dr. Axel Polleres
> >> Digital Enterprise Research Institute, National University of Ireland,
> >> Galway
> >> email: axel.polleres@deri.org  url: http://www.polleres.net/
> >>
> >
> 
> 
> --
> Dr. Axel Polleres
> Digital Enterprise Research Institute, National University of Ireland,
> Galway
> email: axel.polleres@deri.org  url: http://www.polleres.net/

Received on Monday, 6 April 2009 09:50:01 UTC