- From: Hausenblas, Michael <michael.hausenblas@joanneum.at>
- Date: Fri, 21 Dec 2007 09:07:03 +0100
- To: "Richard Cyganiak" <richard@cyganiak.de>
- Cc: "Leo Sauermann" <sauermann@dfki.uni-kl.de>, <semantic-web@w3.org>, "Leo Sauermann" <leo.sauermann@dfki.de>
Richard, Ok. Sorry my fault. I should have been more explicit :) I learned from [1] that the TAG does not proceed with this draft any more and refers to the Cool URI document. As I've already stated in my first mail, I think you did a great job and that is basically the same I said in my bit of the review [2]. The only thing which was unclear for me is if all what has been written in the Cool URI doc is valid in the case of XHTML+RDFa. I did not ask the question to offend anyone nor did I intend to question your contribution. But there will be questions people will ask when implementing RDFa-based stuff (and I like to be prepared :). So, I was after a crystal-clear, approved answer ;) That's were we are. I think I'm happy and see no reasons for 'fighting'. Cheers, Michael [1] http://www.w3.org/2001/tag/doc/httpRange-14/2007-10-04/HttpRange-14.html [2] http://www.w3.org/2006/07/SWD/wiki/ReviewCoolURIs ---------------------------------------------------------- Michael Hausenblas, MSc. Institute of Information Systems & Information Management JOANNEUM RESEARCH Forschungsgesellschaft mbH http://www.joanneum.at/iis/ ---------------------------------------------------------- >-----Original Message----- >From: Richard Cyganiak [mailto:richard@cyganiak.de] >Sent: Thursday, December 20, 2007 12:02 PM >To: Hausenblas, Michael >Cc: Leo Sauermann; semantic-web@w3.org; Leo Sauermann >Subject: Re: Cool URIs, the Semantic Web and Everything > >Michael, > >On 20 Dec 2007, at 07:45, Hausenblas, Michael wrote: >> Thanks for your explanation. I remain not totally convinced :) >> >> So, *if* we agree on what you said, IMHO we should >> reconsider the following paragraph in 'Cool URIs' [1]: > >Okay, so you object to the paragraph quoted below. Perhaps I'm >failing to read between the lines, but I don't know *what* your objection is. >An explanation that refers to the text of the paragraph would be much >appreciated. > >Cheers, >Richard > > >> 'The solutions described in the following apply to deployment >> scenarios >> in which the RDF data and the HTML data is served separately, such >> as a >> standalone RDF/XML document >> along with an HTML document. The metadata can also be embedded in >> HTML, >> using technologies such as >> RDFa [RDFa Primer], microformats and other documents to which the >> GRDDL >> [GRDDL] mechanisms can be applied. >> In those cases the RDF data is extracted from the returned HTML >> document.' >> >> Still unsure if this is just the tip of the iceberg ... >> >> Cheers, >> Michael >> >> [1] http://www.w3.org/TR/2007/WD-cooluris-20071217/#solutions >> >> ---------------------------------------------------------- >> Michael Hausenblas, MSc. >> Institute of Information Systems & Information Management >> JOANNEUM RESEARCH Forschungsgesellschaft mbH >> >> http://www.joanneum.at/iis/ >> ---------------------------------------------------------- >> >> >>> -----Original Message----- >>> From: Leo Sauermann [mailto:sauermann@dfki.uni-kl.de] >>> Sent: Thursday, December 20, 2007 3:43 AM >>> To: Hausenblas, Michael >>> Cc: semantic-web@w3.org; Leo Sauermann >>> Subject: Re: Cool URIs, the Semantic Web and Everything >>> >>> Hi Michael, RDFa people, >>> >>> The question is if httpRange-14 [2] is valid in the case of XHTML >>> +RDFa. >>> >>> The answer is that httpRange-14 is to distinguish URIs for >>> information >>> resources ("web documents") from real-world objects (the person >>> "Alice"). As such, it is a recommendation on URIs. >>> >>> RDFa is an encoding of RDF, and typically an RDFa document has two >>> relations to URIs: >>> a) the URI of the RDFa document (=the information resource where I >>> can >>> download the RDFa document) >>> b) the URIs used as subjects, predicates, objects inside RDF >>> statements >>> written inside RDFa documents >>> >>> a) is usually a http-200 uri, and a) is an information resource (= a >>> document). >>> In the rdf statemetns written inside A, you would use both URIs for >>> real-world objects and information resources. >>> example (I don't know rdfa syntax by heart now, assume this is >>> rdfa): >>> >>> document at www.example.com/homepage/aboutAlice >>> <html> >>> <p rdf:about="http://www.example.com/identifiers/alice#this"> >>> rdf:type foaf:Person. >>> </p> >>> <p rdf:about="http://www.example.com/moreidentifiersusing303/bob"> >>> rdf:type foaf:Person >>> </p> >>> </html> >>> >>> assuming this would be valid RDFa, the URI .../aboutAlice is a >>> http-return-200 informaiton resource >>> .../alice#this is a real-world object as it is not a document (as I >>> understand timbl on that) >>> ...303/bob is not intuitively distinguishable - if you ignore the >>> rdf:type relation you don't know what it is. So for this >uri you do a >>> HTTP get and the server would return a 303 redirect as described in >>> "cool uris". >>> once oyu did the 303, you knowthat ....303/bob is a real world >>> object. >>> >>> so RDFa and 303'/httprange14 are recommendations caring about >>> different >>> angles, 303 is only concerned about URIs, RDFa about an RDF >>> serialization. Technically they don't interfere. >>> >>> If I would use RDFa much and would like cool uris, I would go for >>> #-uris, they are simple to use and easy to embed in RDFa. >>> but as shown above, you can use any URI you want inside rdfa. >>> >>> best >>> Leo >>> >>> >>> Hausenblas, Michael schrieb: >>>> === >>>> Disclaimer: Michael, with his RDFa-Task-Force-member hat off ;) >>>> === >>>> >>>> As I gathered "Cool URIs for the Semantic Web" is a Working >>> Draft, now. >>>> Congrats to Leo and his team, great job! >>>> >>>> The following might sound like a naive question - and I might >>>> have missed something :) - but: Is TAG finding httpRange-14 [2] >>>> equally valid in the case of XHTML+RDFa? >>>> >>>> I've put together some initial thoughts at the ESWiki [3] >>>> - any comments welcome! >>>> >>>> Cheers, >>>> Michael >>>> >>>> [1] >>> http://lists.w3.org/Archives/Public/public-swd-wg/2007Dec/0103.html >>>> [2] http://www.w3.org/2001/tag/issues.html#httpRange-14 >>>> [3] http://esw.w3.org/topic/RDFa_vs_RDFXML >>>> >>>> ---------------------------------------------------------- >>>> Michael Hausenblas, MSc. >>>> Institute of Information Systems & Information Management >>>> JOANNEUM RESEARCH Forschungsgesellschaft mbH >>>> Steyrergasse 17, A-8010 Graz, AUSTRIA >>>> >>>> <office> >>>> phone: +43-316-876-1193 (fax:-1191) >>>> e-mail: michael.hausenblas@joanneum.at >>>> web: http://www.joanneum.at/iis/ >>>> >>>> <private> >>>> mobile: +43-660-7621761 >>>> web: http://www.sw-app.org/ >>>> ---------------------------------------------------------- >>>> >>>> >>> >>> >> >> > >
Received on Friday, 21 December 2007 08:09:14 UTC