There is, however, a possible improvement in Jena parser. It could skip over the faulty triple, and output a non empty graph with the correct one.
Since it should also report the faulty input, I guess this would be in another new method. I guess also that writing a fault tolerant parser is not easy ... 2017-01-19 11:23 GMT+01:00 Jean-Marc Vanel <[email protected]>: > 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$ErrorHandler >> Std.fatal(ErrorHandlerFactory.java:136) >> at >> org.apache.jena.riot.lang.LangEngine.raiseException(LangEngine.java:165) >> at org.apache.jena.riot.lang.LangEngine.nextToken(LangEngine. >> java:108) >> at >> org.apache.jena.riot.lang.LangTurtleBase.triples(LangTurtleBase.java:248) >> at >> org.apache.jena.riot.lang.LangTurtleBase.triplesSameSubject( >> LangTurtleBase.java:190) >> at >> org.apache.jena.riot.lang.LangTurtle.oneTopLevelElement(Lang >> Turtle.java:46) >> at >> org.apache.jena.riot.lang.LangTurtleBase.runParser(LangTurtl >> eBase.java:89) >> at org.apache.jena.riot.lang.LangBase.parse(LangBase.java:42) >> at >> org.apache.jena.riot.RDFParserRegistry$ReaderRIOTLang.read(R >> DFParserRegistry.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/R >> ome>; >> > rev="describedby", < >> > http://mementoarchive.lanl.gov/dbpedia/timegate/http://dbped >> ia.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 <+33%206%2089%2016%2029%2052> > Twitter: @jmvanel , @jmvanel_fr ; chat: irc://irc.freenode.net#eulergui > -- 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
