您好，我是本体的新手。
我下载了 dbpedia ontology .owl 文件并使用 topbraid composer 打开它。
Topbraid composer 展示了 dbpedia 类（owl:Thing -> Activity, Agent, .. etc）。每个类也有自己的实例。
但是，yago2s 只提供了许多 .ttl 文件（yagoSchema.ttl、yagoFact.ttl .. 等）。因为我认为这些 ttl 文件类似于 owl 文件，我也使用 topbraid composer 打开它。我希望看到像 dbpedia owl 文件这样的结构，但它与 dbpedia owl 文件不相似。它们分别提供模式 ttl 文件、实例 ttl 文件、...文件，但我想立即查看整个内容。
我应该得到 yago2s owl 文件吗？或者有什么方法可以查看像 dbpedia owl 这样的 yago ttl 文件？
提前致谢。
我尝试打开 yagoTypes.ttl 文件时的错误消息是
java.lang.reflect.InvocationTargetException
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:421)
at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:507)
at org.eclipse.ui.internal.progress.ProgressMonitorJobsDialog.run(ProgressMonitorJobsDialog.java:275)
at org.eclipse.ui.internal.progress.ProgressManager$3.run(ProgressManager.java:960)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.internal.progress.ProgressManager.busyCursorWhile(ProgressManager.java:995)
at org.eclipse.ui.internal.progress.ProgressManager.busyCursorWhile(ProgressManager.java:970)
at org.topbraidcomposer.core.io.TBCIO$3.run(TBCIO.java:501)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4145)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3762)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1113)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:997)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:140)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:611)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:567)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:354)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:636)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)
at org.eclipse.equinox.launcher.Main.run(Main.java:1450)
at org.eclipse.equinox.launcher.Main.main(Main.java:1426)
引起：java.lang.NullPointerException
at org.topbraid.core.model.Classes.getMetaClasses(Classes.java:548)
at org.topbraid.core.model.Classes.computeMetaClasses(Classes.java:45)
at org.topbraidcomposer.core.session.AbstractSessionWithCache.getCachedMetaClasses(AbstractSessionWithCache.java:67)
at org.topbraid.core.model.Classes.getMetaClasses(Classes.java:166)
at org.topbraidcomposer.editors.ResourceEditorLauncher.checkVisibility(ResourceEditorLauncher.java:270)
at org.topbraidcomposer.editors.ResourceEditorLauncher.access$4(ResourceEditorLauncher.java:269)
at org.topbraidcomposer.editors.ResourceEditorLauncher$5.run(ResourceEditorLauncher.java:577)
at org.topbraidcomposer.core.io.TBCIO$2.run(TBCIO.java:482)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)
当我使用 cat 命令连接 yagoTypes.ttl 和 yagoFacts.ttl 并尝试打开这个连接的文件时，也会发生同样的错误。