I hardly ever use describe, but this morning I had a question on the 
results it returns, so I tested describe on geotravel.ttl using Version: 
3.6.1.v20120622-1546R.   Composer  throws a nullpointer exception.  Is 
DESCRIBE implemented?

*DESCRIBE*  
<http://www.topbraidcomposer.org/owl/2006/07/geotravel.owl#FourSeasons> 


Operation failed.


On: Sep 17, 2012 11:38:27 AM


Reason:

java.lang.NullPointerException

at com.hp.hpl.jena.sparql.syntax.ElementWalker.walk(ElementWalker.java:29)

at com.hp.hpl.jena.sparql.syntax.ElementWalker.walk(ElementWalker.java:24)

at org.topbraid.sparql.Activator$3.createQueryExecution(Activator.java:211)

at 
org.topbraid.spin.arq.ARQFactory.createQueryExecution(ARQFactory.java:281)

at 
org.topbraid.spin.arq.ARQFactory.createQueryExecution(ARQFactory.java:263)

at 
org.topbraidcomposer.sparql.view.SPARQLView.createQueryExecution(SPARQLView.java:261)

at 
org.topbraidcomposer.sparql.view.SPARQLView$10.runSelectOrDescribe(SPARQLView.java:450)

at org.topbraidcomposer.sparql.view.SPARQLView$10.run(SPARQLView.java:434)

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

at java.lang.Thread.run(Thread.java:680)


I also tested DESCRIBE ?x WHERE{?x rdf:type travel:LuxuryHotel} and also 
get an exception

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