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Re: Content negotiation for Turtle files

From: Kingsley Idehen <kidehen@openlinksw.com>
Date: Tue, 05 Feb 2013 19:56:12 -0500
Message-ID: <5111AA2C.80705@openlinksw.com>
To: public-lod@w3.org
On 2/5/13 6:49 PM, Bernard Vatant wrote:
> Hello all
>
> Back in 2006, I thought had understood with the help of folks around 
> here, how to configure my server for content negotiation at 
> lingvoj.org <http://lingvoj.org>.
> Both vocabulary and instances were published in RDF/XML.
>
> I updated the ontology last week, and since after years of happy 
> living with RDF/XML people eventually convinced that it was a bad, 
> prehistoric and ugly syntax, I decided to be trendy and published the 
> new version in Turtle at http://www.lingvoj.org/ontology_v2.0.ttl
>
> The vocabulary URI is still the same : 
> http://www.lingvoj.org/ontology, and the namespace 
> http://www.lingvoj.org/ontology# (cool URI don't change)
>
> Then I turned to Vapour to test this new publication, and found out 
> that to be happy with the vocabulary URI it has to find some answer 
> when requesting application/rdf+xml. But since I have no more RDF/XML 
> file for this version, what should I do?
> I turned to best practices document at 
> http://www.w3.org/TR/swbp-vocab-pub, but it does not provide examples 
> with Turtle, only RDF/XML.
>
> So I blindly put the following in the .htaccess : AddType 
> application/rdf+xml .ttl
> I found it a completely stupid and dirty trick ... but amazigly it 
> makes Vapour happy.
>
> But now Firefox chokes on http://www.lingvoj.org/ontology_v2.0.ttl 
> because it seems to expect a XML file. Chrome has not this issue.
> The LOV-Bot says there is a content negotiation issue and can't get 
> the file. So does Parrot.
>
> I feel dumb, but I'm certainly not the only one, I've stumbled upon a 
> certain number of vocabularies published in Turtle for which the 
> conneg does not seem to be perfectly clear either.
>
> What do I miss, folks? Should I forget about it, and switch back to 
> good ol' RDF/XML?

Hoping you see the contradiction re. content-type:

curl -IL http://www.lingvoj.org/ontology
HTTP/1.1 303 See Other
Date: Wed, 06 Feb 2013 00:54:13 GMT
Server: Apache
Location: http://www.lingvoj.org/ontology_v2.0.ttl
Content-Type: text/html; charset=iso-8859-1

HTTP/1.1 200 OK
Date: Wed, 06 Feb 2013 00:54:13 GMT
Server: Apache
Last-Modified: Fri, 01 Feb 2013 19:16:02 GMT
ETag: "60172428-5258-4d4ae92f95333"
Accept-Ranges: bytes
Content-Length: 21080
Content-Type: application/rdf+xml


Kingsley


>
> Bernard
>
> -- 
> *Bernard Vatant
> *
> Vocabularies & Data Engineering
> Tel : + 33 (0)9 71 48 84 59
> Skype : bernard.vatant
> Blog : the wheel and the hub <http://blog.hubjects.com/>
> --------------------------------------------------------
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>
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>


-- 

Regards,

Kingsley Idehen	
Founder & CEO
OpenLink Software
Company Web: http://www.openlinksw.com
Personal Weblog: http://www.openlinksw.com/blog/~kidehen
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Received on Wednesday, 6 February 2013 00:56:35 UTC

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