Vielen Dank Lorenz Thanks for the accurate diagnosis and the bug report to Virtuoso.
I was aware of the issue; I was testing from my semantic_forms application, were the exception catching has gone wrong recently (and Scala language does not require to catch exceptions). 2017-01-19 10:05 GMT+01:00 Lorenz B. <[email protected]>: > Hi, > > can you clarify what doesn't work? > > I tried your example and it would work, but I'm getting a parse > exception because DBpedia (resp. Virtuoso) still returns illegal data: > > Graph g = RDFDataMgr.loadGraph("http://dbpedia.org/resource/Rome";); > System.out.println(g.size()); > > > [line: 1863, col: 13] Failed to find a prefix name or keyword: > –(8211;0x2013) > Exception in thread "main" org.apache.jena.riot.RiotException: [line: > 1863, col: 13] Failed to find a prefix name or keyword: –(8211;0x2013) > at > org.apache.jena.riot.system.ErrorHandlerFactory$ErrorHandlerStd.fatal( > ErrorHandlerFactory.java:136) > at > org.apache.jena.riot.lang.LangEngine.raiseException(LangEngine.java:165) > at org.apache.jena.riot.lang.LangEngine.nextToken(LangEngine.java:108) > at > org.apache.jena.riot.lang.LangTurtleBase.triples(LangTurtleBase.java:248) > at > org.apache.jena.riot.lang.LangTurtleBase.triplesSameSubject( > LangTurtleBase.java:190) > at > org.apache.jena.riot.lang.LangTurtle.oneTopLevelElement( > LangTurtle.java:46) > at > org.apache.jena.riot.lang.LangTurtleBase.runParser(LangTurtleBase.java:89) > at org.apache.jena.riot.lang.LangBase.parse(LangBase.java:42) > at > org.apache.jena.riot.RDFParserRegistry$ReaderRIOTLang.read( > RDFParserRegistry.java:179) > at org.apache.jena.riot.RDFDataMgr.process(RDFDataMgr.java:861) > at org.apache.jena.riot.RDFDataMgr.parse(RDFDataMgr.java:667) > at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:212) > at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:105) > at org.apache.jena.riot.RDFDataMgr.loadGraph(RDFDataMgr.java:346) > > > > > If there is no parsing error (e.g.http://dbpedia.org/resource/Mars works > for me) the result is as expected: > > > Graph g = RDFDataMgr.loadGraph("http://dbpedia.org/resource/Mars";); > System.out.println(g.size()); > > Output: 347 > > > The issue was already reported by me, see [1], and [2] > > [1] https://github.com/openlink/virtuoso-opensource/issues/567 > [2] https://github.com/openlink/virtuoso-opensource/issues/569 > > > > Kind regards, > Lorenz > > > Reading a dbPedia resource with e.g. RDFDataMgr.loadGraph() does not > > currently work (it used to work with Jena 3.1.1 ). > > Apparently this is because of the 303 redirection. > > Is there another call in Jena API to handle redirections and accepting > RDF > > MIME types ? > > > > wget --save-headers --header='Accept: application/rdf+xml' > > http://dbpedia.org/resource/Rome > > --2017-01-19 09:30:08-- http://dbpedia.org/resource/Rome > > Résolution de dbpedia.org (dbpedia.org)… 194.109.129.58 > > Connexion à dbpedia.org (dbpedia.org)|194.109.129.58|:80… connecté. > > requête HTTP transmise, en attente de la réponse… *303 See Other* > > Emplacement : http://dbpedia.org/data/Rome.xml [suivant] > > --2017-01-19 09:30:08-- http://dbpedia.org/data/Rome.xml > > Réutilisation de la connexion existante à dbpedia.org:80. > > requête HTTP transmise, en attente de la réponse… 200 OK > > Taille : 1003627 (980K) [application/rdf+xml] > > Enregistre : «Rome.2» > > > > less Rome.2 > > HTTP/1.1 200 OK > > Date: Thu, 19 Jan 2017 08:30:08 GMT > > Content-Type: application/rdf+xml; charset=UTF-8 > > Content-Length: 1003627 > > Connection: keep-alive > > Vary: Accept-Encoding > > Server: Virtuoso/07.20.3217 (Linux) i686-generic-linux-glibc212-64 VDB > > Expires: Thu, 26 Jan 2017 08:30:08 GMT > > Link: <http://creativecommons.org/licenses/by-sa/3.0/>;rel="license",< > > http://dbpedia.org/data/Rome.n3>; rel="alternate"; type="text/n3"; > > title="Structured Descriptor Document (N3/Turtle format)", < > > http://dbpedia.org/data/Rome.json>; rel="alternate"; > > type="application/json"; title="Structured Descriptor Document (RDF/JSON > > format)", <http://dbpedia.org/data/Rome.atom>; rel="alternate"; > > type="application/atom+xml"; title="OData (Atom+Feed format)", < > > http://dbpedia.org/data/Rome.jsod>; rel="alternate"; > > type="application/odata+json"; title="OData (JSON format)", < > > http://dbpedia.org/page/Rome>; rel="alternate"; type="text/html"; > > title="XHTML+RDFa", <http://dbpedia.org/resource/Rome>; rel=" > > http://xmlns.com/foaf/0.1/primaryTopic";, <http://dbpedia.org/resource/ > Rome>; > > rev="describedby", < > > http://mementoarchive.lanl.gov/dbpedia/timegate/http:// > dbpedia.org/data/Rome.xml>; > > rel="timegate" > > X-SPARQL-default-graph: http://dbpedia.org > > Cache-Control: max-age=604800 > > Access-Control-Allow-Origin: * > > Access-Control-Allow-Credentials: true > > Access-Control-Allow-Methods: GET, POST, OPTIONS > > Access-Control-Allow-Headers: > > DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With, > If-Modified-Since,Cache-Control,Content-Type,Accept-Encoding > > Accept-Ranges: bytes > > > > <?xml version="1.0" encoding="utf-8" ?> > > <rdf:RDF > > xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"; > > ... > > > -- > Lorenz Bühmann > AKSW group, University of Leipzig > Group: http://aksw.org - semantic web research center > > -- Jean-Marc Vanel Profil: http://163.172.179.125:9111/display?displayuri=http%3A%2F%2Fjmvanel.free.fr%2Fjmv.rdf%23me Déductions SARL - Consulting, services, training, Rule-based programming, Semantic Web +33 (0)6 89 16 29 52 Twitter: @jmvanel , @jmvanel_fr ; chat: irc://irc.freenode.net#eulergui
