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RE: Provenance in RDF

From: Ronald Daniel <rdaniel@interwoven.com>
Date: Wed, 27 Feb 2002 12:24:30 -0800
Message-ID: <145C1D60907A4944ABAE75DE3FF6418C5C17B4@xchanger3.interwoven.com>
To: "'Geoff Chappell'" <geoff@sover.net>, Dave Reynolds <der@hplb.hpl.hp.com>, "RDF Interest (E-mail)" <www-rdf-interest@w3.org>
Geoff,

I've heard the term 'quad' used a couple of different ways.
I assume you mean it as "a triple plus an ID", but it would
be good if you could confirm or correct that.


Thanks,
Ron Daniel Jr.
Standards Architect
Interwoven, Inc.
803 11'th Ave.
Sunnyvale, CA, USA  94089
Tel: 408 530 5922
Cell: 925 368 8371 
Email: rdaniel@interwoven.com

Visit www.interwoven.com
The Leader in Enterprise Content Management

> -----Original Message-----
> From: Geoff Chappell [mailto:geoff@sover.net]
> Sent: Wednesday, February 27, 2002 11:28 AM
> To: Dave Reynolds; RDF Interest (E-mail)
> Subject: Re: Provenance in RDF
> 
> 
> 
> ----- Original Message -----
> From: "Dave Reynolds" <der@hplb.hpl.hp.com>
> To: "RDF Interest (E-mail)" <www-rdf-interest@w3.org>
> Sent: Wednesday, February 27, 2002 7:14 AM
> Subject: Provenance in RDF
> 
> 
> > We are working on a semantic web related application that needs some
> provenance
> > support. We have various routes for doing this but would be 
> interested in
> > hearing of other's experiences. Are there any groups out 
> there that have
> > developed applications supporting provenance within RDF 
> that would be
> willing to
> > share their experiences on what worked well or badly?
> >
> [...]
> >
> > Dave
> 
> We put up a site to test this and other issues a while back
> (http://www.intellidimension.com/itdsw/default.asp). The 
> source and time is
> stored for each statement and statement visibility to queries 
> is controlled
> by rules (i.e. if the statement comes from a source you 
> trust, you see it --
> {?p ?s ?o} <- {[x:sourceOf] ?source {?p ?s ?o}} and {[x:trusts]
> [x:CurrentUser] ?source}.
> 
> We started with conventional triple-based reification (1 statement = 4
> triples + provenance triples) but moved to a quad 
> representation internally
> for performance reasons (1 statement = 1 quad + provenance triples).
> Performance was workable with triple reification but much 
> improved with
> quads.
> 
> Geoff
> 
Received on Wednesday, 27 February 2002 15:25:01 GMT

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