- From: Richard Cyganiak <richard@cyganiak.de>
- Date: Thu, 20 Dec 2007 11:02:23 +0000
- To: "Hausenblas, Michael" <michael.hausenblas@joanneum.at>
- Cc: "Leo Sauermann" <sauermann@dfki.uni-kl.de>, <semantic-web@w3.org>, "Leo Sauermann" <leo.sauermann@dfki.de>
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 Thursday, 20 December 2007 11:02:35 UTC