Hi
On start sorry for my bad english.
I must do small example project for my study with read/write RDF graph
from file.
With Turtle,N-Triples, RDF/XML i dont have any problem i use:
FileManager.get().addLocatorClassLoader(Main.class.getClassLoader());
Model model = null;
try
{
model= FileManager.get().loadModel("./plik.ttl");
}
catch(Exception e)
{
System.out.println(e);
}
model.write(System.out,"TURTLE");
model.write(System.out,"N-TRIPLES");
model.write(System.out);
But when i try read TriG or N-Quads file
my file example (Da.txt):
<http://example/A> <http://example/B> <http://example/C>
<http://example/D> .
using:
Model nowy= FileManager.get().loadModel("./Da.txt", "N-QUADS");
nowy.write(System.out, "TRIG");
nowy.write(System.out, "NQUADS");
log4j: reset attribute= "false".
log4j: Threshold ="null".
log4j: Level value for root is [DEBUG].
log4j: root level set to DEBUG
log4j: Class name: [org.apache.log4j.ConsoleAppender]
log4j: Parsing layout of class: "org.apache.log4j.PatternLayout"
log4j: Setting property [conversionPattern] to [%d{yyyy-MM-dd HH:mm:ss}
%-5p %c{1}:%L - %m%n].
log4j: Adding appender named [console] to category [root].
2015-04-22 21:45:28 DEBUG JenaIOEnvironment:181 - Failed to find
configuration:
location-mapping.ttl;location-mapping.rdf;location-mapping.n3;etc/location-mapping.rdf;etc/location-mapping.n3;etc/location-mapping.ttl
2015-04-22 21:45:28 DEBUG FileManager:257 - loadModel(./plik.ttl)
2015-04-22 21:45:28 DEBUG StreamManager:112 - Not mapped: ./plik.ttl
2015-04-22 21:45:28 DEBUG StreamManager:93 - open(./plik.ttl)
2015-04-22 21:45:28 DEBUG StreamManager:112 - Not mapped: ./plik.ttl
2015-04-22 21:45:28 DEBUG StreamManager:142 - Found: ./plik.ttl
(LocatorFile)
2015-04-22 21:45:28 DEBUG RDFDataMgr:875 - Found: ./plik.ttl
2015-04-22 21:45:28 DEBUG FileManager:274 - loadModel(./Da.txt, N-QUADS)
2015-04-22 21:45:28 DEBUG StreamManager:112 - Not mapped: ./Da.txt
2015-04-22 21:45:28 DEBUG StreamManager:93 - open(./Da.txt)
2015-04-22 21:45:28 DEBUG StreamManager:112 - Not mapped: ./Da.txt
2015-04-22 21:45:28 DEBUG StreamManager:142 - Found: ./Da.txt (LocatorFile)
2015-04-22 21:45:28 DEBUG RDFDataMgr:875 - Found: ./Da.txt
2015-04-22 21:45:28 WARN riot:77 - Only triples or default graph data
expected : named graph data ignored
com.hp.hpl.jena.shared.NoWriterForLangException: TRIG
Im realy "green" in Jena and RDF.
I use Windows 7 64bit and NetBeans 8.0.2
Can someone explain me how to read/write N-Quads and TriG?
Realy thx for any anwser
--
Pozdrawiam
Wojciech Ciesielski
