[Cps4] Relations

[Florent Guillaume]

First, please all keep in mind that the roadmap is still very much  
open to discussion. What I checked in is only a first draft to get  
started.

On 13 Apr 2006, at 16:40, Anahide Tchertchian wrote:
> Small thoughts about relations within the JCR. The Roadmap says:
>
> "It's possible to store relations in a special JCR workspace. For  
> instance a Node could be the subject, a Property the predicate, and  
> the object would be either a literal or a reference (to another  
> subject)."
>
> It seems ok to me, and in fact we don't need the whole RDF  
> machinery to store relations between documents (like we would need  
> for comments for instance).
>
> But as far as I got it, the JCR specifies that references can only  
> be made to nodes existing in the *same* workspace, so I'm not sure  
> we could store relations in a special workspace.

The version history is (virtually) part of all workspaces, so we can  
make references there.

Another more difficuly problem would probably be the queries  
themselves, because in JCR an single query can't at the same time  
return some items and also dereference the references contained in them.

Florent

-- 
Florent Guillaume, Nuxeo (Paris, France)   Director of R&D
+33 1 40 33 71 59   http://nuxeo.com   fg at nuxeo.com