I can see that this.getPrefixFor( value ) returns null, where value is "http://www.w3.org/2001/XMLSchema#";. https://github.com/apache/jena/blob/main/jena-core/src/main/java/org/apache/jena/rdfxml/xmloutput/impl/BaseXMLWriter.java#L229
No idea why though. On Wed, Jul 13, 2022 at 5:03 PM Martynas Jusevičius <marty...@atomgraph.com> wrote: > > Hi, > > Never seen this exception before and not sure yet what causes it: > > java.lang.NullPointerException: Cannot invoke "String.equals(Object)" > because "prefix" is null > org.apache.jena.rdfxml.xmloutput.impl.BaseXMLWriter.checkLegalPrefix(BaseXMLWriter.java:845) > org.apache.jena.rdfxml.xmloutput.impl.BaseXMLWriter.setNsPrefix(BaseXMLWriter.java:324) > org.apache.jena.rdfxml.xmloutput.impl.BaseXMLWriter.primeNamespace(BaseXMLWriter.java:232) > org.apache.jena.rdfxml.xmloutput.impl.BaseXMLWriter.setupNamespaces(BaseXMLWriter.java:482) > org.apache.jena.rdfxml.xmloutput.impl.BaseXMLWriter.write(BaseXMLWriter.java:466) > org.apache.jena.rdfxml.xmloutput.impl.BaseXMLWriter.write(BaseXMLWriter.java:456) > com.atomgraph.linkeddatahub.server.io.ValidatingModelProvider.write(ValidatingModelProvider.java:129) > > Any hints?
