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RE: Sync'ing triplestores

From: Joshua Allen <joshuaa@microsoft.com>
Date: Mon, 4 Apr 2005 12:13:58 -0700
Message-ID: <0E36FD96D96FCA4AA8E8F2D199320E5204B3EB89@RED-MSG-43.redmond.corp.microsoft.com>
To: "Geoff Chappell" <geoff@sover.net>, Bill de hÓra <bill.dehora@propylon.com>, <semantic-web@w3.org>
Cc: "Danny Ayers" <danny.ayers@gmail.com>

Yeah, I was thinking just don't support bnodes -- replace them with some urn:bnode:random-guid syntax
 

> -----Original Message-----
> From: Geoff Chappell [mailto:geoff@sover.net] 
> Sent: Monday, April 04, 2005 11:58 AM
> To: Joshua Allen; 'Bill de hÓra'; semantic-web@w3.org
> Cc: 'Danny Ayers'
> Subject: RE: Sync'ing triplestores
> 
> 
> 
> > -----Original Message-----
> > From: semantic-web-request@w3.org 
> [mailto:semantic-web-request@w3.org] 
> > On Behalf Of Joshua Allen
> > Sent: Monday, April 04, 2005 2:03 PM
> > To: Bill de hÓra; semantic-web@w3.org
> > Cc: Danny Ayers
> > Subject: RE: Sync'ing triplestores
> > 
>  
> > As for identifying the triples, I would just let each quad
> > (context+triple) identify the triple.  The context would  
> be the URI 
> > for the source feed, perhaps.
> 
> That might not be enough if the statement contains a blank node. 
> 
> For example if your repository contains:
> 
> _:a1 a rss:item; dc:title "Item 1".
> _:a2 a rss:item; dc:title "Item 2".
> 
> And your update statement says:
> 
> Delete:  
> 
> _:b1 a rss:item
> 
> What happens? Both get deleted? Neither? It's tricky to 
> identify blank nodes. You have to rely on identification by 
> description and if you don't have an inverse function 
> property to work with, you just have to hope that your 
> description is unambiguous.
> 
> -Geoff
> 
> 
Received on Monday, 4 April 2005 19:13:58 UTC

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