Hi Bernard, On 30 nov 2010, at 09:56, Bernard Vatant wrote: > BTW seems to me (now that you eventually led me to the OWL file) there is > another way this ontology does not follow Linked Data best practices : It > does not rely on any other vocabulary, although many classes and properties > it defines could be easily find in what I call the Linked Open Vocabularies > (FOAF, Dublin Core, BIBO, FRBR etc.)
Well, strictly speaking Metalex OWL was never intended as a Linked Data vocabulary, but rather an ontology in the more traditional sense that happens to use OWL. A fairly sensible approach in a pre-linked-open-government-data world (i.e. pre mid-2009). Of course, now, I fully agree that it should have been more interlinked with existing vocabularies. But I'm reluctant to have to go through (and pay for) yet another lengthy CEN standardisation track ;) > Regarding this last point I'm in the process to gather in the single dataset > how vocabularies used in the LOD cloud rely on each other. Stay tuned, > publication in the days to come, bandwidth permitting. Interesting stuff. Cheers, Rinke > > Best > > Bernard > > 2010/11/30 Tim Berners-Lee <ti...@w3.org> > Bernard, > > You have been tripped up by abuse of content negotiation. > > Their document says they do conneg. > > cwm http://www.metalex.eu/metalex/1.0 > gives you data, as cwm only asks for RDF. > > Following it by hand > $ curl -H Accept:application/rdf+xml http://www.metalex.eu/metalex/1.0 > <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> > <html><head> > <title>303 See Other</title> > </head><body> > <h1>See Other</h1> > <p>The answer to your request is located <a > href="http://svn.metalex.eu/svn/MetaLexWS/branches/latest/metalex-cen.owl";>here</a>.</p> > <hr> > <address>Apache/2.2.11 (Ubuntu) DAV/2 SVN/1.5.4 mod_jk/1.2.26 > PHP/5.2.6-3ubuntu4.6 with Suhosin-Patch mod_python/3.3.1 Python/2.6.2 > mod_ruby/1.2.6 Ruby/1.8.7(2008-08-11) mod_ssl/2.2.11 OpenSSL/0.9.8g > mod_perl/2.0.4 Perl/v5.10.0 Server at www.metalex.eu Port 80</address> > </body></html> > $ > > *** Note here we are a 303 which means that what we are being redirected to > is NOT the > ontology, but may be relevant. The chain of custody is broken, te site does > not assert that what follows > is the ontology. But let us follow it anyway: > > Following the 303 > > $ curl -H Accept:application/rdf+xml > http://svn.metalex.eu/svn/MetaLexWS/branches/latest/metalex-cen.owl > <?xml version="1.0"?> > > > <!DOCTYPE rdf:RDF [ > <!ENTITY owl "http://www.w3.org/2002/07/owl#"; > > <!ENTITY owl11 "http://www.w3.org/2006/12/owl11#"; > > [...] > xmlns:metalex="http://www.metalex.eu/metalex/2008-05-02#"; > xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"; > xmlns:owl="http://www.w3.org/2002/07/owl#";> > <owl:Ontology rdf:about=""> > [...] > > *** Note that here you do get some RDF. > > Tabulator can read that. Each term is as you explore marked by a red dot to > indicate that it could not be looked up on the web. Because: > ** You do not get information about the namespace > xmlns:metalex="http://www.metalex.eu/metalex/2008-05-02#"; > instead of the one you originally asked about! > > So after all that you can see what they are getting at and how they are > thinking. > But their linked data is seriously and needlessly broken. > > To fix it, they should just serve the ontology with 200 from > http://www.metalex.eu/metalex/1.0 > and fix the namespace in it to be that. No conneg. > > > *** Without Firefox, however, even with tabulator, so accepting RDF or HTML, > is redirected to: > http://www.cen.eu/cen/Sectors/Sectors/ISSS/CEN%20Workshop%20Agreements/Pages/MLX%20CWAs.aspx > which is a sort of a home page about the document, with copyright stuff, > but it is not the ontology. > > So they are using the same URI for two documents with very different > information, which is architecturally bad and practically messed you up. > > Note that John Shedidan (Ccd) and colleagues have put the UK laws on line > with lots of RDF -- you could sync up wit them if you haven't > > Moral: point tabulator at it and if it doesn't work, fix it. > Tim > > PS: Their copyright > > "CWAs are CEN copyright. Those made available for downloading are provided on > the condition that they may not be modified, re-distributed, sold or > repackaged in any form without the prior consent of CEN, and are only for the > use of the person downloading them. For additional copyright information, > please refer to the statements on the cover pages of the CWAs concerned." > sounds as though if it applies to the ontology, which isn't obvious > > On 2010-11 -29, at 14:41, Bernard Vatant wrote: > >> Hi all >> >> According to http://www.ckan.net/tag/format-metalex there are two datasets >> in the LOD cloud relying on metalex ontology. >> >> But they provide different URIs for this ontology ... >> >> http://www.best-project.nl/rechtspraak.ttl says : >> void:vocabulary <http://www.metalex.eu/schema> >> >> http://www.legislation.gov.uk/ukpga/1985/67/section/6/data.rdf says : >> xmlns:metalex="http://www.metalex.eu/metalex/2008-05-02#"; >> >> ... and both are dead links ... >> >> OTOH http://www.metalex.eu/documentation/ says: >> "The namespace of the CEN MetaLex XML Schema and OWL specification is >> http://www.metalex.eu/metalex/1.0"; >> >> ... which redirects to ... well ... >> >> Too bad because this metalex ontology looks really interesting :) >> >> Pointer, someone? >> >> Bernard >> -- >> Bernard Vatant >> Senior Consultant >> Vocabulary & Data Engineering >> Tel: +33 (0) 971 488 459 >> Mail: bernard.vat...@mondeca.com >> ---------------------------------------------------- >> Mondeca >> 3, cité Nollez 75018 Paris France >> Web: http://www.mondeca.com >> Blog: http://mondeca.wordpress.com >> ---------------------------------------------------- > > > > > -- > Bernard Vatant > Senior Consultant > Vocabulary & Data Engineering > Tel: +33 (0) 971 488 459 > Mail: bernard.vat...@mondeca.com > ---------------------------------------------------- > Mondeca > 3, cité Nollez 75018 Paris France > Web: http://www.mondeca.com > Blog: http://mondeca.wordpress.com > ---------------------------------------------------- --- Dr Rinke Hoekstra AI Department | Leibniz Center for Law Faculty of Sciences | Faculty of Law Vrije Universiteit | Universiteit van Amsterdam De Boelelaan 1081a | Kloveniersburgwal 48 1081 HV Amsterdam | 1012 CX Amsterdam +31-(0)20-5987752 | +31-(0)20-5253497 r.j.hoeks...@vu.nl | hoeks...@uva.nl Homepage: http://www.few.vu.nl/~hoekstra
