Hi, There is obviously an issue with the Model.write method for TriG format.
Run the following to see that ttl is returned when Trig is requested...Formats names are based on https://jena.apache.org/documentation/io/ package io.bdrc.ldspdi.test; import org.apache.jena.rdf.model.Model; import org.apache.jena.rdf.model.ModelFactory; public class WriteTrigTest { public static void main(String[] args) { Model mod=ModelFactory.createDefaultModel(); mod.read("http://purl.bdrc.io/resource/T00AG0281.ttl"); System.out.println("***************** TURTLE **************************"); mod.write(System.out,"TURTLE"); System.out.println("***************** JSON **************************"); mod.write(System.out,"RDF/JSON"); System.out.println("***************** TRIG **************************"); mod.write(System.out,"TriG"); } } Marc