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Re: Blank Node Identifiers and RDF Dataset Normalization

From: Steve Harris <steve.harris@garlik.com>
Date: Fri, 1 Mar 2013 11:51:47 +0000
Cc: Manu Sporny <msporny@digitalbazaar.com>, RDF WG <public-rdf-wg@w3.org>, Linked JSON <public-linked-json@w3.org>
Message-Id: <26C1E079-C889-4A36-BF02-7D3A69CAC5AF@garlik.com>
To: Kingsley Idehen <kidehen@openlinksw.com>
On 2013-02-27, at 16:36, Kingsley Idehen <kidehen@openlinksw.com> wrote:

> On 2/27/13 10:37 AM, Steve Harris wrote:
>> I don't want to throw numbers about, but for us the cost of anything that significantly decreases the efficiency of our RDF storage carries a huge monetary cost - we couldn't justify it without a significant upside.
> This is a very important point, and from the DBMS engineering perspective it's true. There are costs to existing RDF stores and DBMS engines.
> 
> A suggestion:
> 
> Manu: JSON-LD should make a note about the use of bnodes to denote graphs. That note could then hone into its special use case scenarios e.g., where there's high velocity data with little mass.
> 
> Steve:
> As already acknowledged above, you are correct about the optimization cost to existing RDF stores and DBMS engines (it will hit Virtuoso too) . Thus, when our engines encounter such data, we could simply  just remap the IRIs as part of our data ingestion (insert | import) routines. That's what we'll end up doing.
> 
> Naturally, this means tweaking existing code re. data import, ingestion, and creation etc.. Personally, I believe we have the ability to close out this matter without holding up the various workgroups i.e., RDF 1.1 stays as is. JSON-LD has a fleshed out version of the note I suggested to Manu etc..
> 
> Manu/Steve:
> 
> What do you think?

I believe that would be equivalent to defining the syntactic construct to generate Skolem URIs at parse time - but I've not through about it too deeply.

- Steve

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Steve Harris
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Received on Friday, 1 March 2013 11:52:17 GMT

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