SPARQLMotion tutorial and issues

[arguscesus]

Hi, I am an experienced Semantic web developer, but new to TBC and SPARQLMotion. I tried the simplest import news feed and the tutorial, and had issues to start with your documentations. Please help and update your tutorial.

tutorial: http://www.topquadrant.com/sparqlmotion/tutorial/SPARQLMotionTutorial.pdf

For the simple import News feed. sml:url "http://composing-the-semantic-web.blogspot.com/atom.xml". I just created this single module. When I clicked RUN, got the following error messages:

java.lang.reflect.InvocationTargetException

at org.topbraidcomposer.sparqlmotion.actions.AbstractExecuteSPARQLMotionAction$1.run(AbstractExecuteSPARQLMotionAction.java:153)

at org.topbraidcomposer.core.util.ThreadUtil$1$1.run(ThreadUtil.java:64)

at java.lang.Thread.run(Unknown Source)

Caused by: org.topbraid.spin.sparqlmotion.modules.SMException: java.io.IOException: java.lang.NullPointerException

at org.topbraid.sparqlmotion.lib.internal.ImportNewsFeedModule.createGraph(ImportNewsFeedModule.java:43)

at org.topbraid.spin.sparqlmotion.modules.AbstractSMModule.getRDFOutput(AbstractSMModule.java:907)

at org.topbraid.spin.sparqlmotion.engine.impl.ExecutionEngineImpl.executeModule(ExecutionEngineImpl.java:176)

at org.topbraid.spin.sparqlmotion.engine.impl.ExecutionEngineImpl.execute(ExecutionEngineImpl.java:118)

at org.topbraidcomposer.sparqlmotion.views.console.SPARQLMotionConsole.execute(SPARQLMotionConsole.java:79)

at org.topbraidcomposer.sparqlmotion.actions.AbstractExecuteSPARQLMotionAction$1.run(AbstractExecuteSPARQLMotionAction.java:142)

... 2 more

Caused by: java.io.IOException: java.lang.NullPointerException

at org.topbraid.feeds.graphstore.FeedsGraphStore.load(FeedsGraphStore.java:94)

at org.topbraid.sparqlmotion.lib.internal.ImportNewsFeedModule.createGraph(ImportNewsFeedModule.java:37)

... 7 more

For the exercise 1 in the tutorial, I had to specify a targetFilePath in "Load Countries". Otherwise it displays a warning "missing value augument targetFilePath", and got error messages when I clicked RUN. 

java.lang.reflect.InvocationTargetException

at org.topbraidcomposer.sparqlmotion.actions.AbstractExecuteSPARQLMotionAction$1.run(AbstractExecuteSPARQLMotionAction.java:153)

at org.topbraidcomposer.core.util.ThreadUtil$1$1.run(ThreadUtil.java:64)

at java.lang.Thread.run(Unknown Source)

Caused by: org.topbraid.spin.sparqlmotion.modules.SMException: the string value is missing for targetFilePath

at org.topbraid.spin.sparqlmotion.modules.AbstractSMModule.getConfigString(AbstractSMModule.java:526)

at org.topbraid.spin.sparqlmotion.modules.AbstractSMModule.getConfigString(AbstractSMModule.java:488)

at org.topbraid.spin.sparqlmotion.modules.AbstractSMModule.getConfigString(AbstractSMModule.java:475)

at org.topbraid.spin.sparqlmotion.modules.AbstractSMModule.getConfigFile(AbstractSMModule.java:377)

at org.topbraid.spin.sparqlmotion.lib.internal.ImportFileFromURLModule.execute(ImportFileFromURLModule.java:32)

at org.topbraid.spin.sparqlmotion.engine.impl.ExecutionEngineImpl.execute(ExecutionEngineImpl.java:202)

at org.topbraid.spin.sparqlmotion.engine.impl.ExecutionEngineImpl.executeModule(ExecutionEngineImpl.java:168)

at org.topbraid.spin.sparqlmotion.engine.impl.ExecutionEngineImpl.execute(ExecutionEngineImpl.java:118)

at org.topbraidcomposer.sparqlmotion.views.console.SPARQLMotionConsole.execute(SPARQLMotionConsole.java:79)

at org.topbraidcomposer.sparqlmotion.actions.AbstractExecuteSPARQLMotionAction$1.run(AbstractExecuteSPARQLMotionAction.java:142)

... 2 more

If I specify a targetFilePath, the output of this module won't go to the next module "Export All" - export to RDF file.

Here are the session data:

eclipse.buildId=unknown

java.version=1.7.0_67

java.vendor=Oracle Corporation

BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US

Command-line arguments:  -os win32 -ws win32 -arch x86_64

[Holger Knublauch]

Hi, and thanks for your feedback.

On 4/29/2015 12:44, arguscesus wrote:

Hi, I am an experienced Semantic web developer, but new to TBC and SPARQLMotion. I tried the simplest import news feed and the tutorial, and had issues to start with your documentations. Please help and update your tutorial.

tutorial: http://www.topquadrant.com/sparqlmotion/tutorial/SPARQLMotionTutorial.pdf

For the simple import News feed. sml:url "http://composing-the-semantic-web.blogspot.com/atom.xml". I just created this single module. When I clicked RUN, got the following error messages:

java.lang.reflect.InvocationTargetException

at org.topbraidcomposer.sparqlmotion.actions.AbstractExecuteSPARQLMotionAction$1.run(AbstractExecuteSPARQLMotionAction.java:153)

at org.topbraidcomposer.core.util.ThreadUtil$1$1.run(ThreadUtil.java:64)

at java.lang.Thread.run(Unknown Source)

Caused by: org.topbraid.spin.sparqlmotion.modules.SMException: java.io.IOException: java.lang.NullPointerException

at org.topbraid.sparqlmotion.lib.internal.ImportNewsFeedModule.createGraph(ImportNewsFeedModule.java:43)

at org.topbraid.spin.sparqlmotion.modules.AbstractSMModule.getRDFOutput(AbstractSMModule.java:907)

at org.topbraid.spin.sparqlmotion.engine.impl.ExecutionEngineImpl.executeModule(ExecutionEngineImpl.java:176)

at org.topbraid.spin.sparqlmotion.engine.impl.ExecutionEngineImpl.execute(ExecutionEngineImpl.java:118)

at org.topbraidcomposer.sparqlmotion.views.console.SPARQLMotionConsole.execute(SPARQLMotionConsole.java:79)

at org.topbraidcomposer.sparqlmotion.actions.AbstractExecuteSPARQLMotionAction$1.run(AbstractExecuteSPARQLMotionAction.java:142)

... 2 more

Caused by: java.io.IOException: java.lang.NullPointerException

at org.topbraid.feeds.graphstore.FeedsGraphStore.load(FeedsGraphStore.java:94)

at org.topbraid.sparqlmotion.lib.internal.ImportNewsFeedModule.createGraph(ImportNewsFeedModule.java:37)

... 7 more

I was able to reproduce this issue. Our Newsfeed importer had trouble with handling blank nodes. Since this example relies on an external URL, outside of our control, the data has apparently changed to a format that was previously not encountered. I have fixed this for 5.0. Meanwhile, you'd need to try some other newsfeed, or skip this tutorial exercise.

For the exercise 1 in the tutorial, I had to specify a targetFilePath in "Load Countries". Otherwise it displays a warning "missing value augument targetFilePath", and got error messages when I clicked RUN.

I cannot reproduce this. "Load Countries" should not even ask for targetFilePath - assuming it has type sml:ImportRDFFromURL. Could you double-check that you didn't instantiate some other type here? Please send us the file if you are unsure.

Thanks,
Holger

java.lang.reflect.InvocationTargetException

at org.topbraidcomposer.sparqlmotion.actions.AbstractExecuteSPARQLMotionAction$1.run(AbstractExecuteSPARQLMotionAction.java:153)

at org.topbraidcomposer.core.util.ThreadUtil$1$1.run(ThreadUtil.java:64)

at java.lang.Thread.run(Unknown Source)

Caused by: org.topbraid.spin.sparqlmotion.modules.SMException: the string value is missing for targetFilePath

at org.topbraid.spin.sparqlmotion.modules.AbstractSMModule.getConfigString(AbstractSMModule.java:526)

at org.topbraid.spin.sparqlmotion.modules.AbstractSMModule.getConfigString(AbstractSMModule.java:488)

at org.topbraid.spin.sparqlmotion.modules.AbstractSMModule.getConfigString(AbstractSMModule.java:475)

at org.topbraid.spin.sparqlmotion.modules.AbstractSMModule.getConfigFile(AbstractSMModule.java:377)

at org.topbraid.spin.sparqlmotion.lib.internal.ImportFileFromURLModule.execute(ImportFileFromURLModule.java:32)

at org.topbraid.spin.sparqlmotion.engine.impl.ExecutionEngineImpl.execute(ExecutionEngineImpl.java:202)

at org.topbraid.spin.sparqlmotion.engine.impl.ExecutionEngineImpl.executeModule(ExecutionEngineImpl.java:168)

at org.topbraid.spin.sparqlmotion.engine.impl.ExecutionEngineImpl.execute(ExecutionEngineImpl.java:118)

at org.topbraidcomposer.sparqlmotion.views.console.SPARQLMotionConsole.execute(SPARQLMotionConsole.java:79)

at org.topbraidcomposer.sparqlmotion.actions.AbstractExecuteSPARQLMotionAction$1.run(AbstractExecuteSPARQLMotionAction.java:142)

... 2 more

If I specify a targetFilePath, the output of this module won't go to the next module "Export All" - export to RDF file.

Here are the session data:

eclipse.buildId=unknown

java.version=1.7.0_67

java.vendor=Oracle Corporation

BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US

Command-line arguments:  -os win32 -ws win32 -arch x86_64

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[arguscesus]

Hi Holger,
Thanks for your help. As to the second issue, I chose "import file from URL" type by mistake. I will walk through the rest of the tutorial and keep you updated.

[arguscesus]

Hi, Holger,

There are other issues with the tutorial.
Exercise 5 needs exercise4-output.ttl as one input to get capital information. It indicates that this file should have countries and their capitals generated in Exercise 4. In fact, in exercise 4, we only added abbrev3 property to exercise3-output.ttl.

Thanks.

On Wednesday, April 29, 2015 at 2:30:47 AM UTC-4, Holger Knublauch wrote:

[Irene Polikoff]

Thanks, we will make the necessary change. In the meantime, please use exercise3-output.ttl as the input to the Exercise 5.

Regards,

Irene