Re: Statements/Reified statements

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/