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RE: namespaces

From: Polleres, Axel <axel.polleres@siemens.com>
Date: Mon, 2 Jul 2012 09:31:16 +0200
To: "pgearon@revelytix.com" <pgearon@revelytix.com>, "public-rdf-dawg@w3.org" <public-rdf-dawg@w3.org>
Message-ID: <9DA51FFE5E84464082D7A089342DEEE8013E03604D67@ATVIES9917WMSX.ww300.siemens.net>

was added to contain all SPARQL functions. If I remember correctly, the agreement was that all the functions we have defined in SPARQL1.1 (incl. the old ones from SPARQL1.0) have a URI in this namespace, even if they have equivalents in XPath or RIF).


Dr. Axel Polleres
Siemens AG Österreich
Corporate Technology Central Eastern Europe Research & Technologies

Tel.: +43 (0) 51707-36983
Mobile: +43 (0) 664 88550859
Fax: +43 (0) 51707-56682 mailto:axel.polleres@siemens.com

> -----Original Message-----
> From: Paul Gearon [mailto:pgearon@revelytix.com]
> Sent: Thursday, 28 June 2012 10:13 PM
> To: SPARQL Working Group
> Subject: namespaces
> Hi all,
> In the work I'm doing we're looking at mapping External
> functions into their SPARQL equivalents. That's OK for XPath
> and RIF built-ins (where equivalent functions exist), but
> there are a few functions that only occur in SPARQL. In this
> case we want to use namespaces like sfn:.
> The Query document mentions the sfn: namespace in 1.2.1,
> though it's not referenced again. It also points to the list at:
>   http://www.w3.org/2009/sparql/wiki/SPARQL_Namespaces
> This list includes functions from SPARQL 1.0. From memory,
> nothing was formally approved for 1.0, though there is the page at:
> http://lists.w3.org/Archives/Public/public-rdf-dawg/2006AprJun
> /att-0138/sparql-function-uri.html
> So I'm wondering if there has been any acceptance of these
> old 1.0 URIs, and what may have happened with the new
> functions in 1.1. We're also concerned about not knowing the
> case to use for the fragment portion of URIs (since the case
> varies throughout the SPARQL query document, yet URIs are
> case sensitive).
> I remember there being some discussion around URIs a while
> back, but I don't recall anything coming of it beyond what
> I've mentioned. I also note that the page corresponding to
> the location specified by the sfn:
> namespace has only a single function in it (bound), and there
> is a note in the Query document saying it ought to be
> populated. If it does get populated, then having a link to
> that page from the query document would be useful as well (it
> seems archaic to have to copy/paste to follow a link).
> Have I missed what transpired wrt to namespaces, or did the
> discussion stall? If it's stalled, then I'm loathe to
> introduce new work, but I do need to refer to the SPARQL
> functions, and I don't want to be minting my own URIs to do it.
> Regards,
> Paul Gearon
> Revelytix, Inc
Received on Monday, 2 July 2012 07:32:06 UTC

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