Question

我使用 tdbload2 （在jena3.2.0中）从 freebase-rdf-latest 构建数据库。

发生错误，

[cc @ localhost dir] $ ../apache-jena-3.2.0/bin/tdbloader2 --loc =。/ d-freebase / ./freebase-rdf-latest

21:33:22 INFO - TDB Bulk Loader Start

21:33:22 INFO数据加载阶段

21:33:22 INFO要加载1个数据文件

21:33:22 INFO数据文件1：freebase-rdf-latest

INFO载入：freebase-rdf-latest - 2017/04/06 21:33:23 CST

org.apache.jena.riot。 RiotException ：无法确定内容类型：（URI = freebase-rdf-latest：stream = null）

at org.apache.jena.riot.RDFDataMgr.process(RDFDataMgr.java:854)
at org.apache.jena.riot.RDFDataMgr.parse(RDFDataMgr.java:667)
at org.apache.jena.riot.RDFDataMgr.parse(RDFDataMgr.java:637)
at org.apache.jena.riot.RDFDataMgr.parse(RDFDataMgr.java:626)
at org.apache.jena.riot.RDFDataMgr.parse(RDFDataMgr.java:617)
at org.apache.jena.tdb.store.bulkloader2.ProcNodeTableBuilder.exec(ProcNodeTableBuilder.java:78)
at tdb.bulkloader2.CmdNodeTableBuilder.exec(CmdNodeTableBuilder.java:113)
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 tdb.bulkloader2.CmdNodeTableBuilder.main(CmdNodeTableBuilder.java:61)

21:33:23错误在数据阶段失败

但是当我在 jena 2.12.1 中使用tdbload2时，没有发生错误！

所以，我想知道为什么在jena 3.2.0中使用tdbload2时会引发RiotException？

freebase-rdf-latest的格式，

＆＃13;

<http://rdf.freebase.com/ns/american_football.football_player.footballdb_id>    <http://rdf.freebase.com/ns/type.object.type>   <http://rdf.freebase.com/ns/type.property>      .
<http://rdf.freebase.com/ns/american_football.football_player.footballdb_id>    <http://rdf.freebase.com/ns/type.object.name>   "footballdb ID"@en      .
<http://rdf.freebase.com/ns/american_football.football_player.footballdb_id>    <http://rdf.freebase.com/ns/type.property.unique>       "true"  .

＆＃13;

Answer 1

我不确定Jena版本2.12.1，但我在Jena版本3.2.0中找到了，我需要使用文件扩展名指定内容类型。

尝试重命名输入文件来自＆＃34; ./ freebase-rdf-latest＆＃34; to＆＃34; ./ freebase-rdf-latest.nt＆＃34;。

Jena 3.2.0 tdbload2 riotException：无法确定内容类型

1 个答案: