jena

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am trying to write propreties into a model and then query it.This part of mycode: String directory = "EMAILADDRESS" ; //create the dataset for the tdb store Dataset ds = TDBFactory.createDataset(directory) ; //create default rdf model ds.begin(ReadWrite.WRITE); Model model = ds.getDefaultModel() ; //write to the tdb dataset When I write this and then query the query shows no result ...but when I interchange the order of model and begin i.e. Model model = ds.getDefaultModel() ; //write to the tdb dataset ds.begin(ReadWrite.WRITE); Then it

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm trying to write a Jena built-in to return a value from an algorithm I have been given and then do a comparison against that value, e.g., String rule = "[exRule: (?d rdf:type ex:abc)" + "<-" + // ...extract ?a, ?b to use as inputs to the rule "greaterThan(myBuiltIn(?a, ?b), 1)" + // Is return value greater than 1 "]"; So, first the Jena documentation says that the easiest way to experiment with this is to look at the examples in the builtins directory, however I don't seem to have this in my installation, I'm using Jena 2.6.4 on Windows 7

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Is there any version compatible with java 1.7v in Jena I'm getting following error and i think it is because of incompatibility Exception in thread "main" java.lang.UnsupportedClassVersionError: org/apache/jena/query/QueryFactory : Unsupported major.minor version 52.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:800) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) at java.net.URLClassLoader

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: When trying out Apache Jena with the following code: dataset = TDBFactory . createDataset ( directory ); Model model = dataset . getDefaultModel (); dataset . begin ( ReadWrite . WRITE ); Resource r = model . createResource ( NS + "subject" ); Property p = model . createProperty ( NS + "predicate" ); r . addProperty ( p , "object" ); model . write ( System . out , "Turtle" ); dataset . close (); Jena chokes on this. I am in the process of fixing this and purposely not showing what the content was but I am much more concerned with

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I'm using Jena TDB for loading an RDF dataset and making SPARQL queries against it. I'm using the following maven dependency: org . apache . jena apache - jena - libs pom 3 . 0.1 And here's the java code where I'm trying to create a TDB dataset: public void loadDirectory ( String outputFile ){ Dataset dataset = TDBFactory . createDataset ( directoryPath ); Model tdb = dataset . getDefaultModel (); FileManager . get (). readModel ( tdb , outputFile ); tdb . close (); dataset . close (); LOG . info ( "RDF dataset loaded to memory" );

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I've and OWL file and I can explore it and navigate through classes and properties but I can't retrieve correct range of ObjectProperty. This is part of my OWL file: <owl:ObjectProperty rdf:about = "&aat;aat2209_located_in" > <rdfs:label xml:lang = "en" > located in </rdfs:label> <rdfs:label xml:lang = "it" > si trova in </rdfs:label> <rdfs:comment xml:lang = "en" > The property defines a relationship between places or places and things </rdfs:comment> <rdfs:comment xml:lang = "it" > La proprietà definisce la relazione tra luoghi o

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I need to perform a query against DBpedia: SELECT DISTINCT ?poi ?lat ?long ?photos ?template ?type ?label WHERE { ?poi ?label . ?poi ?lat . ?poi ?long . ?poi ?photos . OPTIONAL {?poi ?template } . OPTIONAL {?poi ?type } . FILTER ( ?lat > x && ?lat z && ?long I'm guessing this information is scattered among different dumps (.nt) files and somehow the SPARQL endpoint serves us with a result set. I need to download these different .nt files locally (not all DBpedia), perform only once my query and store the results locally (I don't want to use

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am trying to use Jena to write to a local free standalone GraphDB (version 8.5.0) repository. What I have tried (1) Direct use from Jena I used this Jena 3.7.0 code snippet: String strInsert = "INSERT DATA {" + "<http://dbpedia.org/resource/Grace_Hopper> " + "<http://dbpedia.org/ontology/birthDate>" + " \"1906-12-9\"^^<http://www.w3.org/2001/XMLSchema#date> .}"; UpdateRequest updateRequest = UpdateFactory.create(strInsert); UpdateProcessor updateProcessor = UpdateExecutionFactory.createRemote(updateRequest, "http://localhost:7200

windows解压后双击fuseki-server.bat linux解压后运行命令 java -jar fuseki-server.jar --update --loc /data/apache-jena-fuseki-3.5.0/run/databases/DB /ds 程序启动后默认在3030端口运行， http://localhost:3030 新建test.rdf，复制以下内容 <?xml version="1.0"?> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:vCard="http://www.w3.org/2001/vcard-rdf/3.0#"> <rdf:Description rdf:about="http://somewhere/MattJones/"> <vCard:FN>Matt Jones</vCard:FN> <vCard:N rdf:parseType="Resource"> <vCard:Family>Jones</vCard:Family> <vCard:Given>Matthew</vCard:Given> </vCard:N> </rdf:Description> <rdf:Description rdf:about="http:/