- From: Kingsley Idehen <kidehen@openlinksw.com>
- Date: Wed, 30 Jul 2008 09:17:53 -0400
- To: Tom Heath <Tom.Heath@talis.com>
- CC: John Goodwin <John.Goodwin@ordnancesurvey.co.uk>, public-lod@w3.org, semantic-web@w3.org
Tom Heath wrote: > Hi Kingsley, > > If I've understood you correctly, you're suggesting that the HTML > document about a pub should 303 to the RDF/XML document about the pub if > RDF/XML is requested, and vice versa. (please correct me if I've > misunderstood) > > Is conneging on description pages desirable? i.e. if I request > http://revyu.com/people/tom/about/rdf > in my regular browser (e.g. vanilla Firefox), should I be redirected to > http://revyu.com/people/tom/about/html ? > > I don't think so, for the simple reason that I might be a developer > wishing to study/debug the RDF. > > Thoughts? > Tom, Two things: 1. Re. Southampton pubs, the issue is resolved re. our RDF Browser, it came down to a combination of cache and URL encoding 2. Re. Content Negotiation, if the data publisher has access rights on the Web Server, I see no reason why Content Negotiation can't be used to provide a clear response that factors in explicit representation requests I my world view, all resources are equal (information or non-informaton variants) on the Web re. URI utility, so when requests are made that are explicit about desired representation, and you are in a position to administer the request target Web Server, use content negotiation to honor the precision of the user agent's request. If I go to a restaurant (in Robot mode i.e. nuance challenged) and ask for a glass of water, and the waiter says: OK, and then deliver me a glass of ice cubes, what am I to do? I don't see any harm in the waiter saying: Sorry, I don't have any water, but I could offer you some ice cubes. Kingsley > Tom. > > P.S. Of course <link .../> tags in the HTML header and foaf:page triples > in the RDF are highly desirable, this question is just about conneg on > URIs of Info Resources. > > > >> -----Original Message----- >> From: public-lod-request@w3.org >> [mailto:public-lod-request@w3.org] On Behalf Of Kingsley Idehen >> Sent: 28 July 2008 16:47 >> To: John Goodwin >> Cc: public-lod@w3.org; semantic-web@w3.org >> Subject: Re: Southampton Pub data as linked open data >> > > >> John, >> >> I am getting: >> >> curl -I -H "Accept: application/rdf+xml" >> http://www.johngoodwin.me.uk/pubs/description/pub1 >> HTTP/1.1 200 OK >> Date: Mon, 28 Jul 2008 15:25:49 GMT >> Server: Apache/2.2.8 (Unix) mod_ssl/2.2.8 OpenSSL/0.9.7a >> mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 >> Last-Modified: Sun, 27 Jul 2008 15:52:16 GMT >> ETag: "1a0322-6ba4-453036415cc00" >> Accept-Ranges: bytes >> Content-Length: 27556 >> Content-Type: text/html >> >> I am requesting the RDF/XML representation of the information >> resource in question via it's URI, but not getting a redirect >> to the RDF representation at: >> <http://www.johngoodwin.me.uk/pubs/data/pub1> . >> >> You're 200 OK in it's current form throws off RDF User Agents >> such as our RDF Browser [1] and Data Explore extension for >> Firefox [2] which will do the following: >> >> 1. Ask for an RDF/XML representation via Content Negotiation >> 2. If we don't locate an RDF information resource from step >> 1; we will scan for <link rel="relevant-predicate" .../>, >> GRDDL, RDFa 3. Normalize 4. Expose RDF graph >> >> We don't expect a 200 OK for an RDF requests with the >> resource in question being an HTML representation, so right >> now, we never get to discover the RDF information resource. >> >> Solution: just 303 to the RDF information resource that >> matches RDF representation request. >> >> Then I should see: http://tinyurl.com/5he54t by starting at: >> http://www.johngoodwin.me.uk/pubs/description/pub1 >> instead of what I see currently at: http://tinyurl.com/6lkuaj >> >> Links: >> >> 1. http://demo.openlinksw.com/rdfbrowser2 >> 2. https://addons.mozilla.org/en-US/firefox/addon/8062 >> >> -- >> >> >> Regards, >> >> Kingsley Idehen Weblog: >> http://www.openlinksw.com/blog/~kidehen >> President & CEO >> OpenLink Software Web: http://www.openlinksw.com >> >> >> >> >> >> >> > > > -- Regards, Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen President & CEO OpenLink Software Web: http://www.openlinksw.com
Received on Wednesday, 30 July 2008 13:18:40 UTC