- From: Jesse Weaver <weavej3@rpi.edu>
- Date: Mon, 26 Sep 2011 11:02:12 -0700
- To: Sebastian Schaffert <sebastian.schaffert@salzburgresearch.at>
- Cc: Alvaro Graves <alvaro@graves.cl>, semantic-web@w3.org, public-lod@w3.org
Hi Sebastian. See http://www.w3.org/TR/swbp-vocab-pub/#recipe1 for how hash URIs are handled. Jesse Weaver Ph.D. Student, Patroon Fellow Tetherless World Constellation Rensselaer Polytechnic Institute http://www.cs.rpi.edu/~weavej3/index.xhtml On Sep 26, 2011, at 8:16 AM, Sebastian Schaffert wrote: > But then I would say the server should at least reply with a 30x > redirect ;-) > > Greetings, > > Sebastian > > Am 26.09.2011 um 17:05 schrieb Alvaro Graves: > >> Hi Sebastian, >> >> AFAIK it's not a bug, but a feature :). This is done to comply with >> the httpRange-14 issue (i.e., you can't retrieve a person through >> HTTP but you can retrieve a document _about_ a person through >> HTTP). Since a person and a document about a person are different >> entities, they should have different URIs. >> >> http://www.w3.org/2001/tag/issues.html#httpRange-14 >> >> ---- >> Alvaro Graves >> >> On Mon, Sep 26, 2011 at 7:46 AM, Sebastian Schaffert <sebastian.schaffert@salzburgresearch.at >> > wrote: >> Dear Jesse, >> >> Thanks for the effort! I am just experimenting with this. If I >> request my own Vanity URL >> >> http://graph.facebook.com/sebastian.schaffert >> >> The data I get back is: >> >> @prefix rdf: <http://www.w3.org/1999/02/22-df-syntax-ns#> . >> @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . >> @prefix owl: <http://www.w3.org/2002/07/owl#> . >> @prefix xsd: <http://www.w3.org/2001/XMLSchema#> . >> @prefix api: <tag:graph.facebook.com,2011:/> . >> @prefix og: <http://ogp.me/ns#> . >> @prefix fb: <http://ogp.me/ns/fb#> . >> @prefix : <http://graph.facebook.com/schema/~/> . >> @prefix user: <http://graph.facebook.com/schema/user#> . >> </561666514#> >> user:id "561666514" ; >> user:name "Sebastian Schaffert" ; >> user:first_name "Sebastian" ; >> user:last_name "Schaffert" ; >> user:link <http://www.facebook.com/sebastian.schaffert> >> >> >> >> Now the problem I see here is that the URI I requested is not the >> same URI as used in the subject of the RDF triples. Same holds btw >> if I request the data using the ID including "#". Which is bad in >> our case because we filter out triples that do not fulfill this >> condition to avoid importing "invalid" data. >> >> Also, the data should IMHO contain a @base statement defining the >> base for the </561666514#>, because when importing the data the >> original URI is sometimes no longer available. >> >> Lastly, the returned data does not contain the trailing "." >> required by turtle (see http://www.w3.org/TeamSubmission/turtle/#sec-grammar-grammar) >> . >> >> Are there plans to fix this? For me, the more readable data would >> look like this: >> >> @prefix rdf: <http://www.w3.org/1999/02/22-df-syntax-ns#> . >> @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . >> @prefix owl: <http://www.w3.org/2002/07/owl#> . >> @prefix xsd: <http://www.w3.org/2001/XMLSchema#> . >> @prefix api: <tag:graph.facebook.com,2011:/> . >> @prefix og: <http://ogp.me/ns#> . >> @prefix fb: <http://ogp.me/ns/fb#> . >> @prefix user: <http://graph.facebook.com/schema/user#> . >> <http://graph.facebook.com/sebastian.schaffert> >> user:id "561666514" ; >> user:name "Sebastian Schaffert" ; >> user:first_name "Sebastian" ; >> user:last_name "Schaffert" ; >> user:link <http://www.facebook.com/sebastian.schaffert> >> >> >> >> Am 23.09.2011 um 14:09 schrieb Jesse Weaver: >> >>> APOLOGIES FOR CROSS-POSTING >>> >>> I would like to bring to subscribers' attention that Facebook now >>> supports RDF with Linked Data URIs from its Graph API. The RDF is >>> in >>> Turtle syntax, and all of the HTTP(S) URIs in the RDF are >>> dereferenceable >>> in accordance with httpRange-14. Please take some time to check >>> it out. >>> >>> If you have a vanity URL (mine is jesserweaver), you can get RDF >>> about you: >>> >>> curl -H 'Accept: text/turtle' http://graph.facebook.com/<vanity-url> >>> curl -H 'Accept: text/turtle' http://graph.facebook.com/jesserweaver >>> If you don't have a vanity URL but know your Facebook ID, you can >>> use >>> that instead (which is actually the fundamental method). >>> >>> curl -H 'Accept: text/turtle' http://graph.facebook.com/<facebook- >>> id> >>> curl -H 'Accept: text/turtle' http://graph.facebook.com/1340421292 >>>> From there, try dereferencing URIs in the Turtle. Have fun! >>> >>> Jesse Weaver >>> Ph.D. Student, Patroon Fellow >>> Tetherless World Constellation >>> Rensselaer Polytechnic Institute >>> http://www.cs.rpi.edu/~weavej3/ >>> >>> >>> >>> >>> >> >> Sebastian >> -- >> | Dr. Sebastian Schaffert sebastian.schaffert@salzburgresearch.at >> | Salzburg Research Forschungsgesellschaft http://www.salzburgresearch.at >> | Head of Knowledge and Media Technologies Group +43 662 >> 2288 423 >> | Jakob-Haringer Strasse 5/II >> | A-5020 Salzburg >> >> >> > > Sebastian > -- > | Dr. Sebastian Schaffert sebastian.schaffert@salzburgresearch.at > | Salzburg Research Forschungsgesellschaft http://www.salzburgresearch.at > | Head of Knowledge and Media Technologies Group +43 662 > 2288 423 > | Jakob-Haringer Strasse 5/II > | A-5020 Salzburg > >
Received on Monday, 26 September 2011 18:02:56 UTC