I think CSV is for writing ResultSet (SELECT results), not Model (CONSTRUCT/DESCRIBE results).
On Wed, 7 Sep 2016 at 23:37, lookman sanni <[email protected]> wrote: > Hi all, > > I am trying in vain to write a Jena model to a text file using > RDFDataMgr.write(outputstream, dataset2, lang). > > This works well for Lang such as RDFXML, TRIG, TURTLE, NQUADS. However for > Lang.CSV, it is firing a RiotException of which I have no idea: > > > *Exception in thread "main" org.apache.jena.riot.RiotException: No graph > writer for null* > * at > org.apache.jena.riot.RDFDataMgr.createGraphWriter$(RDFDataMgr.java:1199)* > * at org.apache.jena.riot.RDFDataMgr.write$(RDFDataMgr.java:1211)* > * at org.apache.jena.riot.RDFDataMgr.write(RDFDataMgr.java:1004)* > * at org.apache.jena.riot.RDFDataMgr.write(RDFDataMgr.java:995)* > * at org.apache.jena.riot.RDFDataMgr.write(RDFDataMgr.java:936)* > * at ....* > > Has anyone come across this in the past and has some hints on its why/how > to solve it ? > > Thanks, Lookman > > -- > Best Regards > > Lookman SANNI >
