我已经owl使用这个生成器生成了一个文件http://swat.cse.lehigh.edu/projects/lubm/
我想将文件转换为 N-triples 并在使用之前完成
$ riot -out N-TRIPLE ~/lubm20/*.owl > lubm20.nt
由于某种原因，现在我得到一个空文件（lubm20.nt）
当我使用
$ rdfcat -out N-TRIPLE ~/lubm20/*.owl > lubm20.nt
我收到这个错误
Exception in thread "main" org.apache.jena.riot.RiotException: <file:///root/lubm20/classes\University0_0.owl> Code: 4/UNWISE_CHARACTER in PATH: The character matches no grammar rules of URIs/IRIs. These characters are permitted in RDF URI References, XML system identifiers, and XML Schema anyURIs.
at org.apache.jena.riot.s5ystem.IRIResolver.exceptions(IRIResolver.java:371)
at org.apache.jena.riot.system.IRIResolver.resolve(IRIResolver.java:328)
at org.apache.jena.riot.system.IRIResolver$IRIResolverSync.resolve(IRIResolver.java:489)
at org.apache.jena.riot.system.IRIResolver.resolveIRI(IRIResolver.java:254)
at org.apache.jena.riot.system.IRIResolver.resolveString(IRIResolver.java:233)
at org.apache.jena.riot.SysRIOT.chooseBaseIRI(SysRIOT.java:109)
at org.apache.jena.riot.adapters.AdapterFileManager.readModelWorker(AdapterFileManager.java:286)
at org.apache.jena.util.FileManager.readModel(FileManager.java:341)
at jena.rdfcat.readInput(rdfcat.java:328)
at jena.rdfcat$ReadAction.run(rdfcat.java:473)
at jena.rdfcat.go(rdfcat.java:231)
at jena.rdfcat.main(rdfcat.java:206)
生成器将生成一个众所周知的语义网络基准数据集，那么它怎么能有
UNWISE_CHARACTER s?
编辑：对于提出的问题，我使用这一行来生成 *.owl 文件
java edu.lehigh.swat.bench.uba.Generator -onto http://swat.cse.lehigh.edu/onto/univ-bench.owl univ 20
然后将 *.owl 文件移动到 lubm20 文件夹