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

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