- From: Ruben Verborgh <ruben.verborgh@ugent.be>
- Date: Thu, 1 Mar 2012 08:28:51 +0100
- To: public-rdf@w3.org, public-rdf-wg@w3.org, W3C SWIG Mailing-List <semantic-web@w3.org>
Dear Semantic Web enthousiasts, Suppose we have a Web application for blogging: - /posts/35 is a blog post - /posts/35/comments are the comments to that post - /posts/35/comments/3 is a specific comment to this post In RDF, it is straightforward to make the relation between the blog post and a specific comment: </posts/35> :hasComment </posts/35/comments/3>. It is also easy to describe the relation between a specific comment and all comments: </posts/35/comments/4> :memberOf </posts/35/comments>. However, how do we indicate the relationship between the blog post and *all* comments that belong to it? I.e., what is the relationship between </posts/35> and </posts/35/comments> ? One could make a new predicate for that of course: </posts/35/> :hasComments </posts/35/comments>. But then, we still have to explain the relation between :hasComments and :hasComment; and we’d have to do that for every such plural predicate. This seems to be a fundamental problem. Clearly, the resource “comments on blog post 35” exists, but there doesn’t seem to be a straightforward way to describe it in RDF. RDF lists will not be sufficient: they could indeed explain the relation between a specific comment and all comments, but not the relation between all comments and the blog post. Also note that the indirect relation “_:x :hasComment _:y. _:y :memberOf _:z” is not sufficient: a blog post can have no comments, but even then it still has an (empty) comments resource. Have you encountered this issue and how do you solve it? Kind regards, -- Ruben Verborgh http://twitter.com/RubenVerborgh PhD Student at Multimedia Lab – IBBT / ELIS, Ghent University, Belgium Make your hypermedia API ready for intelligent agents via http://restdesc.org/.
Received on Thursday, 1 March 2012 07:29:30 UTC