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Re: getting rdf query results as an rdf graph (fwd)

From: Patrick Stickler <patrick.stickler@nokia.com>
Date: Fri, 2 Apr 2004 10:56:26 +0300
Message-Id: <3E0AF05C-847B-11D8-B128-000A95EAFCEA@nokia.com>
Cc: public-rdf-dawg@w3.org
To: "ext Dave Beckett" <dave.beckett@bristol.ac.uk>


As stated during the telecon, if this equates to a requirement
that query results be returned as an RDF graph, then I also fully
support this.

If it means something else, then I have no idea what that is or
whether I'd support it...

Patrick


On Apr 02, 2004, at 00:01, ext Dave Beckett wrote:

>
>
>
> This mail seems relevant.   RDF triples is what I'd support
> as a potential requirement.   I'm already expecting to
> implement this, for Sesame / SeRQL style approaches.
>
> QL syntaxes is another and entirely different matter.
>
> Dave
>
> ---------- Forwarded message ----------
> Date: Thu, 1 Apr 2004 16:54:21 +0100
> From: Phil Dawes <pdawes@users.sourceforge.net>
> To: www-rdf-interest@w3.org
> Subject: getting rdf query results as an rdf graph
> Resent-Date: Thu,  1 Apr 2004 13:49:07 -0500 (EST)
> Resent-From: www-rdf-interest@w3.org
>
>
> Hi All,
>
> I've been involved in developing 5 RDF applications to date, and in
> each I've found that the same architectural pattern emerges each time:
>
> - Application has an in-memory rdf store(s), which it manages and
> accesses via simple fine-grained API. (sortof the M in MVC)
>
> - A number of larger RDF sources/stores exist, which contain
> information useful to the application.
>
> - Application performs remote queries on the larger RDF sources, and
> inserts/merges the results into its local rdf store(s).
>
> - Application uses simpler fine-grained api to walk the internal
> store(s) whilst performing application logic (rendering UI etc..)
>
>
> This is the case even for web-applications with a stateless middle
> tier (i.e. an internal rdf model is built up on each request).
>
> The reason that I'm writing is that in order to facilitate this style
> of architecture, ideally the larger rdf stores need to support
> returning query results as an rdf graph (sometimes a specially
> constructed rdf graph).
> As far as I can see, only Sesame directly supports this (via its seRQL
> construct query), which confuses me.
>
> Is this an uncommon approach?
> Are there disadvantages to this approach compared to using a query
> result format that binds variables to result values (e.g. rdql)?
>
> Many thanks,
>
> Phil
>
>
>
>
>
>

--

Patrick Stickler
Nokia, Finland
patrick.stickler@nokia.com
Received on Friday, 2 April 2004 02:58:32 GMT

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