如何使用 Apache Jena 将 CSV 导入 RDF？

Question

是否可以使用 Apache Jena 从命令行 csv 转换为 rdf？

是否可以提供元数据，帮助转换？

riot 的愚蠢尝试示例：

./apache-jena-3.3.0/bin/riot --base='http://example.com/csvtest/' --syntax=csv --output=ttl csv_dbs_examples/csv_inputs/CDs.csv 
java.lang.NullPointerException
        at org.apache.jena.ext.com.google.common.base.Preconditions.checkNotNull(Preconditions.java:770)
        at org.apache.jena.ext.com.google.common.cache.LocalCache.get(LocalCache.java:4153)
        at org.apache.jena.ext.com.google.common.cache.LocalCache$LocalManualCache.get(LocalCache.java:5060)
        at org.apache.jena.atlas.lib.cache.CacheGuava.getOrFill(CacheGuava.java:58)
        at org.apache.jena.riot.system.IRIResolver$IRIResolverNormal.resolveSilentCache(IRIResolver.java:470)
        at org.apache.jena.riot.system.IRIResolver$IRIResolverNormal.resolveSilent(IRIResolver.java:454)
        at org.apache.jena.riot.system.IRIResolver.resolve(IRIResolver.java:328)
        at org.apache.jena.riot.system.IRIResolver$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.lang.ReaderRIOTCSV.parse(ReaderRIOTCSV.java:89)
        at org.apache.jena.riot.lang.ReaderRIOTCSV.read(ReaderRIOTCSV.java:67)
        at org.apache.jena.riot.RDFParser.read(RDFParser.java:293)
        at org.apache.jena.riot.RDFParser.parseNotUri(RDFParser.java:283)
        at org.apache.jena.riot.RDFParser.parse(RDFParser.java:233)
        at riotcmd.CmdLangParse.parseRIOT(CmdLangParse.java:286)
        at riotcmd.CmdLangParse.parseFile(CmdLangParse.java:216)
        at riotcmd.CmdLangParse.exec$(CmdLangParse.java:161)
        at riotcmd.CmdLangParse.exec(CmdLangParse.java:127)
        at jena.cmd.CmdMain.mainMethod(CmdMain.java:93)
        at jena.cmd.CmdMain.mainRun(CmdMain.java:58)
        at jena.cmd.CmdMain.mainRun(CmdMain.java:45)
        at riotcmd.riot.main(riot.java:34)

Answer 1

有http://jena.apache.org/documentation/csv/（在问题中被调用）但这不是CSVW（W3C标准）。有几种 CSVW 转换工具 - 您可以转换为 RDF，然后将 RDF 读入 Jena。

实际的堆栈跟踪是 3.3.0 中的错误（Apache Jena 3.2.0 应该可以工作）。

Update from @GrzegorzWierzowiecki: Confirmed that it looks like bug in Jena 3.3.0, as it works with Jena 3.1.1

如何使用 Apache Jena 将 CSV 导入 RDF？

How can I import a CSV to RDF using Apache Jena?

csv

import

data-conversion

jena