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Re: Statements/Reified statements

From: Jonas Liljegren <jonas@rit.se>
Date: 28 Nov 2000 12:00:18 +0100
To: Sergey Melnik <melnik@db.stanford.edu>
Cc: RDF Interest Group <www-rdf-interest@w3.org>
Message-ID: <87bsv0tl8d.fsf@jonas.rit.se>
Sergey Melnik <melnik@db.stanford.edu> writes:

> Jonas Liljegren wrote:
>
> > select * from arc where subj in ( select id from arc where pred=? and
> > subj=? and obj=?)
> 
> Well, Jonas, this approach is practically equivalent with the one that I
> have in mind (except that statement IDs are not unique).
> 
> Notice that now you have another trouble: you have to rematerialize the
> quad statements if you want to be spec compliant. What about a query
> like
> 
> 	select * from arc where pred = rdf:predicate
> or
> 	select * from arc where pred = rdf:type and obj = rdf:Statement
> 
> ?

I don't understand the problem with this.


-- 
/ Jonas Liljegren

The Wraf project http://www.uxn.nu/wraf/
Sponsored by http://www.rit.se/
Received on Tuesday, 28 November 2000 05:57:14 GMT

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