- From: Michael Hausenblas <michael.hausenblas@deri.org>
- Date: Thu, 1 Mar 2012 08:05:43 +0000
- To: Ruben Verborgh <ruben.verborgh@ugent.be>
- Cc: public-rdf@w3.org, public-rdf-wg@w3.org, W3C SWIG Mailing-List <semantic-web@w3.org>
Are you aware of http://sioc-project.org/ ...? Cheers, Michael -- Dr. Michael Hausenblas, Research Fellow LiDRC - Linked Data Research Centre DERI - Digital Enterprise Research Institute NUIG - National University of Ireland, Galway Ireland, Europe Tel. +353 91 495730 http://linkeddata.deri.ie/ http://sw-app.org/about.html On 1 Mar 2012, at 07:28, Ruben Verborgh wrote: > 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 08:06:16 UTC