Re: the necessity of describing responses in-band

Hi Ruben,

> On November 9, 2015 at 5:08 PM Ruben Verborgh <ruben.verborgh@ugent.be> wrote:
>
>
> Resurrecting and old thread here, but:
>
> >> Yes and that's quite horrible.
> >> anybody knows why the graph IRI is only a syntactical construct?
> >
> > It is the graph's name but it's semantics are not clear. It is undefined
> > whether the name denotes the graph or not. The reasons for that are because
> > the RDF WG at the time couldn't find consensus.
>
> I just found another example that strongly relies on graph IRIs
> pointing to the same instance as that IRI in subject/object position:
> nanopublications. For example: http://nanopub.org/wordpress/?page_id=57
>
> Does anybody know of other examples?
> I'm thinking of collecting supporting cases for the RDF mailing list.
>
> Posting this on public-hydra because the data/metadata separation
> has important use cases within our domain.
>
> Best,
>
> Ruben
>

I'm not 100% convinced of the need for quads as a response format, but remain
open-minded.

In your post on the subject [1] the Turtle example in "Combining everything"
already seems
pretty clear. All it misses are some triples to link the retrieved resource to
the items
in the collection.

<> hydra:member </items/45158567#id> , </items/35235179#id> ,
</items/10268448#id> .

With those in place it should be pretty easy for any client that understands the
used
vocabularies to effectively distinguish the metadata from the data.

However I can see the attraction to split a graph/document into one or more
subgraph 'containers'.

Basically seems like you are searching for recommendations/principles for
publishing RDF data sets
on the web. Unfortunately I think the ship has already sailed here in the
broader RDF/SPARQL user
base, but possibly not within the Linked Data (Hydra) community.

For example one might recommend to:
- use fragment identifiers to identify the named graphs contained 'in' a
document
- relate a named graph to the containing document using rdfg:subGraphOf property
 
Regards,
John

[1] http://ruben.verborgh.org/blog/2015/10/06/turtles-all-the-way-down/

Received on Monday, 9 November 2015 21:55:10 UTC