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Re: statements about a graph (Named Graphs, reification)

From: K-fe bom <u9x3n_15so@hotmail.com>
Date: Wed, 05 Sep 2007 12:02:38 +0000
Message-ID: <BAY114-F37B93485E71B4E8E764999E1CB0@phx.gbl>
To: semantic-web@w3.org

>From: Richard Cyganiak <richard@cyganiak.de>
>I find that making statements about the URI of the document (in your  case, 
>the HTML page containing the RDFa) works for me. It isn't  technically 
>*quite* the same as annotating the named graph, but often  I find it 
>actually more appropriate to make statements about the  document, not the 

That's an easy option. It will probably work on static documents. What 
happens is that in the web there are some 'documents' that consolidate other 
documents. I can think of blogs. The main URL of the blog is the same, but 
its contents will change a lot, with old posts being archived. I supose this 
suggestion wouldn't work with blogs. And there are application servers that 
use and abuse of URLs and provide dynamic content. Portals are a good 

>I wouldn't worry about statements vs. metastatements. This  distinction is 
>not made in the RDF data model. Metadata is just data.  It's the norm to 
>have RDF documents that contain both metadata and data.

I still think it is preferable to separate the statements. Mainly from a 
data modeling perspective. After Named Graphs they may invent something 
else. And I would like to make fewer assumptions about the location of the 
statements. Perhaps it would be useful to distribute the statements and 
metastatements accross the network in the future.

>If your application needs some kind of privileged metadata, which is  
>handled differently from the rest of the data, then you can put that  
>metadata into one or more separate named graphs.

I only need the main data as a graph. In my case I don't see the need to 
group the  metastatements as a unit.

This is good discussion.


Received on Wednesday, 5 September 2007 12:02:54 UTC

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