Hi Kingsley,

It’s the server that forces a http:// -> https:// redirect — see my
original email.

Martynas

On Fri, 29 Oct 2021 at 16.51, Kingsley Idehen via DBpedia-discussion <
dbpedia-discussion@lists.sourceforge.net> wrote:

> On 10/29/21 6:38 AM, Martynas Jusevičius wrote:
> > No response to this? How is the server supposed to know that http://
> > and https:// resources are the same? In RDF they are not.
> >
> > Another example, this time requesting https://:
> >
> > $ curl -L -OJ -H "Accept: text/turtle"
> https://dbpedia.org/resource/Copenhagen
> >    % Total    % Received % Xferd  Average Speed   Time    Time     Time
> Current
> >                                   Dload  Upload   Total   Spent    Left
> Speed
> >    0     0    0     0    0     0      0      0 --:--:-- --:--:--
> --:--:--     0
> > 100   153  100   153    0     0    725      0 --:--:-- --:--:--
> --:--:--   725
> > 100  675k  100  675k    0     0  1139k      0 --:--:-- --:--:-- --:--:--
> 3235k
> > curl: Saved to filename 'sparql_2021-10-29_10-31-22Z.ttl'
> >
> > $ cat sparql_2021-10-29_10-31-22Z.ttl
> > @prefix dbo:    <http://dbpedia.org/ontology/> .
> > @prefix dbr:    <http://dbpedia.org/resource/> .
> > dbr:Vivi_Bach   dbo:birthPlace  dbr:Copenhagen .
> > ...
>
>
> Hi Martynas,
>
> True, but why are you using https: when you can use http: ?
>
> Do you want the DBpedia DBMS to be littered with owl:sameAs relations
> for this reason when an RDF Agent can infer and apply such relations?
>
> The issue is implicit vs explicit co-reference. Currently, DBpedia is
> taking the "implicit co-reference" world view, for practical purposes.
>
> A possible solution could be injection of the owl:sameAs relations as
> part of the HTTP response payload. Ditto injection into various RDF docs
> returned by Virtuoso.
>
>
> Kingsley
>
> >
> > On Thu, Oct 7, 2021 at 11:20 AM Martynas Jusevičius
> > <marty...@atomgraph.com> wrote:
> >> Hi,
> >>
> >> We have noticed a URI mismatch on DBPedia which breaks Linked Data
> clients.
> >>
> >> The server forces https:// URLs:
> >>
> >> $ curl -I -H "Accept: text/turtle"
> http://dbpedia.org/resource/Copenhagen
> >> HTTP/1.1 303 See Other
> >> Server: nginx/1.18.0
> >> Date: Thu, 07 Oct 2021 09:11:29 GMT
> >> Content-Type: text/html
> >> Content-Length: 153
> >> Connection: keep-alive
> >> Location: https://dbpedia.org/resource/Copenhagen
> >> Access-Control-Allow-Credentials: true
> >> Access-Control-Allow-Methods: HEAD, GET, POST, OPTIONS
> >> Access-Control-Allow-Headers:
> >>
> Depth,DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Accept-Encoding
> >>
> >> But the returned RDF data contains http:// URIs:
> >>
> >> $ curl -o - https://dbpedia.org/data/Copenhagen.ttl
> >> @prefix dbo:    <http://dbpedia.org/ontology/> .
> >> @prefix dbr:    <http://dbpedia.org/resource/> .
> >> <http://dbpedia.org/resource/2011\u201312_West_Ham_United_F.C._season>
> >>   dbo:wikiPageWikiLink    dbr:Copenhagen .
> >> <http://dbpedia.org/resource/AEK_Athens_F.C._in_European_football>
> >>   dbo:wikiPageWikiLink    dbr:Copenhagen .
> >> dbr:Adform      dbo:wikiPageWikiLink    dbr:Copenhagen .
> >> dbr:Helena_Paparizou    dbo:wikiPageWikiLink    dbr:Copenhagen .
> >> dbr:MS_Jutlandia        dbo:wikiPageWikiLink    dbr:Copenhagen .
> >> ...
> >>
> >> Can you please align the URLs in the data so that the resources are
> >> actually self-describing?
> >>
> >> Thanks.
> >>
> >> Martynas
> >> atomgraph.com
> >
> > _______________________________________________
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> > DBpedia-discussion@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion
>
>
> --
> Regards,
>
> Kingsley Idehen
> Founder & CEO
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