Re: dbpedia lite
Nicholas: Check out the MimeParse project on GoogleCode for a nice set of language bindings (including Ruby) that does a very good job of following the RFC2616 (sec 14.1) for content-negotiation: http://code.google.com/p/mimeparse/ Thanks, I will keep that in mind. nick. http://www.bbc.co.uk/ This e-mail (and any attachments) is confidential and may contain personal views which are not the views of the BBC unless specifically stated. If you have received it in error, please delete it from your system. Do not use, copy or disclose the information in any way nor act in reliance on it and notify the sender immediately. Please note that the BBC monitors e-mails sent or received. Further communication will signify your consent to this.
Re: dbpedia lite
On 19/05/2010 13:25, Ross Singer rossfsin...@gmail.com wrote: Nicholas, Given that you're using Sinatra, you might want use http://github.com/mbklein/rack-conneg for your content negotiation (not sure why RDF.rb would be involved in that layer, anyway) and use either rdf-raptor or RdfContext to supply the various serializations. The bit that would be valuable from RDF.rb is the list of supported MIME types and associated q values. Arto has said that he is working on something, so I am going to wait and see what that is. I don't think rdf-raptor will work on Heroku, because of the lack of libraptor. I am not sure how much work it would be to bundle raptor into the rdf-raptor gem, but probably not worth it. It would be great to use the RdfContext serialisers with RDF.rb. nick. http://www.bbc.co.uk/ This e-mail (and any attachments) is confidential and may contain personal views which are not the views of the BBC unless specifically stated. If you have received it in error, please delete it from your system. Do not use, copy or disclose the information in any way nor act in reliance on it and notify the sender immediately. Please note that the BBC monitors e-mails sent or received. Further communication will signify your consent to this.
Re: dbpedia lite
Nicholas Humfrey wrote: Re. http://dbpedialite.org/, any chance that you could add link rel=alternate .../ links in head/ such that the HTML based Descriptor Docs are associated with alternative Descriptor Docs in different formats (JSON, N3 etc..). Yes, certainly. I have put this on my Todo list. In addition, would you consider adding RDFa into the HTML Descriptor docs such that they to becomes a machine readable structured Linked Data Sources for RDFa aware agents etc. There is RDFa already there for the Thing pages. Is there something missing? Is it Void type stuff that you want me to add to the RDFa? Hmm, I get: http://linkeddata.uriburner.com/about/html/http/dbpedialite.org/things/52780 Which returns: Unable to retrieve RDF data from http://dbpedialite.org/things/52780: HTTP/1.0 400 Bad Request Hi Kingsley, No RDF/XML or proper content negotiation yet. Coming soon hopefully. There is support for N-Triples and JSON: curl -i -H Accept: text/plain http://dbpedialite.org/things/52780 curl -i -H Accept: application/json http://dbpedialite.org/things/52780 nick. http://www.bbc.co.uk/ This e-mail (and any attachments) is confidential and may contain personal views which are not the views of the BBC unless specifically stated. If you have received it in error, please delete it from your system. Do not use, copy or disclose the information in any way nor act in reliance on it and notify the sender immediately. Please note that the BBC monitors e-mails sent or received. Further communication will signify your consent to this.
Re: dbpedia lite
On May 20, 2010, at 10:51 , Nicholas Humfrey wrote: I also tried curl -i -H Accept: text/turtle http://dbpedialite.org/things/52780 and it said: unsupported format: text/turtle (text/turtle is the media type defined in [1]) But when running the RDFa distiller (or any similar service) on the URI, regardless of media type, the content is correct. Sorry Ivan. No Turtle support yet... I understand, that is fine... In the meantime what you can do is to add an .htaccess entry that redirect the turtle version to a call to an online RDFa extractor that produces turtle. This is not optimal at all, because it leads to another request somewhere else, but may be fine as a temporary measure... Just an idea! Cheers Ivan nick. http://www.bbc.co.uk/ This e-mail (and any attachments) is confidential and may contain personal views which are not the views of the BBC unless specifically stated. If you have received it in error, please delete it from your system. Do not use, copy or disclose the information in any way nor act in reliance on it and notify the sender immediately. Please note that the BBC monitors e-mails sent or received. Further communication will signify your consent to this. Ivan Herman, W3C Semantic Web Activity Lead Home: http://www.w3.org/People/Ivan/ mobile: +31-641044153 PGP Key: http://www.ivan-herman.net/pgpkey.html FOAF: http://www.ivan-herman.net/foaf.rdf smime.p7s Description: S/MIME cryptographic signature
Java Framework for Content Negotiation
Hello, I am just looking for a framework to do content negotiation in java. Currently I am checking the HttpServletRequest myself quickdirty. Perhaps someone can recommend a framework/library that has solved this already. Thanks in advance, Angelo
Re: Java Framework for Content Negotiation
There is the RESTlet framework http://www.restlet.org/ Henry On 20 May 2010, at 10:49, Angelo Veltens wrote: Hello, I am just looking for a framework to do content negotiation in java. Currently I am checking the HttpServletRequest myself quickdirty. Perhaps someone can recommend a framework/library that has solved this already. Thanks in advance, Angelo
Re: Java Framework for Content Negotiation
Hi Angelo, On Thu, May 20, 2010 at 11:49 AM, Angelo Veltens angelo.velt...@online.de wrote: Hello, I am just looking for a framework to do content negotiation in java. Currently I am checking the HttpServletRequest myself quickdirty. Perhaps someone can recommend a framework/library that has solved this already. I suggest taking a look at Restlet [1], which has support for both the client and server side of conneg (and a lot more). Best regards, Niklas [1]: http://www.restlet.org/
Re: Java Framework for Content Negotiation
On 20/05/2010 11:03, Story Henry wrote: There is the RESTlet framework http://www.restlet.org/ There's also Jersey [1] and, for a minimalist solution to just the content matching piece see Mimeparse [2]. Dave [1] https://jersey.dev.java.net/ [2] http://code.google.com/p/mimeparse/ On 20 May 2010, at 10:49, Angelo Veltens wrote: Hello, I am just looking for a framework to do content negotiation in java. Currently I am checking the HttpServletRequest myself quickdirty. Perhaps someone can recommend a framework/library that has solved this already. Thanks in advance, Angelo
Re: Java Framework for Content Negotiation
There's also Jersey [1] ... +1 to Jersey - had overall very good experience with it. If you want to have a quick look (not saying it's beautiful/exciting, but might helps to kick-start things) see [1] for my hacking with it. Cheers, Michael [1] http://bitbucket.org/mhausenblas/sparestfulql/ -- Dr. Michael Hausenblas LiDRC - Linked Data Research Centre DERI - Digital Enterprise Research Institute NUIG - National University of Ireland, Galway Ireland, Europe Tel. +353 91 495730 http://linkeddata.deri.ie/ http://sw-app.org/about.html From: Dave Reynolds dave.e.reyno...@googlemail.com Date: Thu, 20 May 2010 11:08:03 +0100 To: Angelo Veltens angelo.velt...@online.de Cc: Linked Data community public-lod@w3.org Subject: Re: Java Framework for Content Negotiation Resent-From: Linked Data community public-lod@w3.org Resent-Date: Thu, 20 May 2010 10:08:45 + On 20/05/2010 11:03, Story Henry wrote: There is the RESTlet framework http://www.restlet.org/ There's also Jersey [1] and, for a minimalist solution to just the content matching piece see Mimeparse [2]. Dave [1] https://jersey.dev.java.net/ [2] http://code.google.com/p/mimeparse/ On 20 May 2010, at 10:49, Angelo Veltens wrote: Hello, I am just looking for a framework to do content negotiation in java. Currently I am checking the HttpServletRequest myself quickdirty. Perhaps someone can recommend a framework/library that has solved this already. Thanks in advance, Angelo
Re: Java Framework for Content Negotiation
On 20 May 2010, at 11:18, Michael Hausenblas wrote: There's also Jersey [1] ... +1 to Jersey - had overall very good experience with it. If you want to have a quick look (not saying it's beautiful/exciting, but might helps to kick-start things) see [1] for my hacking with it. Since this is an RDF list, I wrote a blog post on how one could use Jersey to create linked data using annotations on objects http://blogs.sun.com/bblfish/entry/serialising_java_objects_to_rdf Something that could be looked into in more detail I have not had time to pursue it since then, but others are welcome to continue from there Henry Cheers, Michael [1] http://bitbucket.org/mhausenblas/sparestfulql/ -- Dr. Michael Hausenblas LiDRC - Linked Data Research Centre DERI - Digital Enterprise Research Institute NUIG - National University of Ireland, Galway Ireland, Europe Tel. +353 91 495730 http://linkeddata.deri.ie/ http://sw-app.org/about.html From: Dave Reynolds dave.e.reyno...@googlemail.com Date: Thu, 20 May 2010 11:08:03 +0100 To: Angelo Veltens angelo.velt...@online.de Cc: Linked Data community public-lod@w3.org Subject: Re: Java Framework for Content Negotiation Resent-From: Linked Data community public-lod@w3.org Resent-Date: Thu, 20 May 2010 10:08:45 + On 20/05/2010 11:03, Story Henry wrote: There is the RESTlet framework http://www.restlet.org/ There's also Jersey [1] and, for a minimalist solution to just the content matching piece see Mimeparse [2]. Dave [1] https://jersey.dev.java.net/ [2] http://code.google.com/p/mimeparse/ On 20 May 2010, at 10:49, Angelo Veltens wrote: Hello, I am just looking for a framework to do content negotiation in java. Currently I am checking the HttpServletRequest myself quickdirty. Perhaps someone can recommend a framework/library that has solved this already. Thanks in advance, Angelo
Re: Java Framework for Content Negotiation
On 20.05.2010 12:18, Michael Hausenblas wrote: There's also Jersey [1] ... +1 to Jersey - had overall very good experience with it. If you want to have a quick look (not saying it's beautiful/exciting, but might helps to kick-start things) see [1] for my hacking with it. Cheers, Michael [1] http://bitbucket.org/mhausenblas/sparestfulql/ Mmh, i have been thinking about using REST-Webservice already, but there is one thing i'm quite unsteady with: I might have a non-information resource http://example.org/resource/foo I could place a REST-Webservice there and do content negotiation with @GET / @Produces Annotations. But this seems not correct to me, because it is a non-information resource and not a html or rdf/xml document. So it should never return html or rdf/xml but do a 303 redirect to an information resource instead, doesn't it? Kind regards, Angelo
Re: Java Framework for Content Negotiation
Angelo, I might have a non-information resource http://example.org/resource/foo I could place a REST-Webservice there and do content negotiation with @GET / @Produces Annotations. But this seems not correct to me, because it is a non-information resource and not a html or rdf/xml document. So it should never return html or rdf/xml but do a 303 redirect to an information resource instead, doesn't it? This is a recurring pattern and people tend to confuse things (conneg and 303), in my experience. I assume you've read [1], already ? ;) Without more detailed knowledge about what you want to achieve it is hard for me to tell you anything beyond what has been discussed in various forums. Can you give me a more concrete description of your setup and goals? How does your data look like? What's the task you try to solve? Etc. Cheers, Michael [1] http://www.w3.org/TR/cooluris/ -- Dr. Michael Hausenblas LiDRC - Linked Data Research Centre DERI - Digital Enterprise Research Institute NUIG - National University of Ireland, Galway Ireland, Europe Tel. +353 91 495730 http://linkeddata.deri.ie/ http://sw-app.org/about.html From: Angelo Veltens angelo.velt...@online.de Date: Thu, 20 May 2010 14:38:53 +0200 To: Linked Data community public-lod@w3.org Subject: Re: Java Framework for Content Negotiation Resent-From: Linked Data community public-lod@w3.org Resent-Date: Thu, 20 May 2010 12:39:34 + On 20.05.2010 12:18, Michael Hausenblas wrote: There's also Jersey [1] ... +1 to Jersey - had overall very good experience with it. If you want to have a quick look (not saying it's beautiful/exciting, but might helps to kick-start things) see [1] for my hacking with it. Cheers, Michael [1] http://bitbucket.org/mhausenblas/sparestfulql/ Mmh, i have been thinking about using REST-Webservice already, but there is one thing i'm quite unsteady with: I might have a non-information resource http://example.org/resource/foo I could place a REST-Webservice there and do content negotiation with @GET / @Produces Annotations. But this seems not correct to me, because it is a non-information resource and not a html or rdf/xml document. So it should never return html or rdf/xml but do a 303 redirect to an information resource instead, doesn't it? Kind regards, Angelo
Re: Java Framework for Content Negotiation
On 20 May 2010, at 10:49, Angelo Veltens wrote: I am just looking for a framework to do content negotiation in java. There's a reasonably stable and well-tested implementation that is used both in the Pubby and D2R Server codebases. See here: http://d2rq-map.cvs.sourceforge.net/viewvc/d2rq-map/d2r-server/src/de/fuberlin/wiwiss/pubby/negotiation/ This just does the negotiation part (that is, matching an HTTP Accept header against a list of media types that the server supports, including support for q values). It only supports media type negotiation, there's nothing for language negotiation or encoding negotiation in there. The package works like this: You configure a ContentTypeNegotiator with the media types supported by your app. Then you use its getBestMatch(...) method to determine the best response for a given request. The PubbyNegotiator class has a pre-configured negotiator for a server that supports HTML and various RDF syntaxes. Best, Richard Currently I am checking the HttpServletRequest myself quickdirty. Perhaps someone can recommend a framework/library that has solved this already. Thanks in advance, Angelo
Re: Java Framework for Content Negotiation
On 20 May 2010, at 13:38, Angelo Veltens wrote: I might have a non-information resource http://example.org/resource/ foo I could place a REST-Webservice there and do content negotiation with @GET / @Produces Annotations. But this seems not correct to me, because it is a non-information resource and not a html or rdf/xml document. So it should never return html or rdf/xml but do a 303 redirect to an information resource instead, doesn't it? I second Michael's recommendation to have a look at the Cool URIs for SemWeb document, in particular this section: http://www.w3.org/TR/cooluris/#r303gendocument But also: http://www.w3.org/TR/cooluris/#hashuri http://www.w3.org/TR/cooluris/#choosing If you can build your site with hash URIs rather than 303 redirects, I highly recommend doing so. Best, Richard Kind regards, Angelo
