Andy Seaborne wrote: > SERVICE SILENT may be what you are looking for. Strictly, this is > continue (with no results) if any part fails but in ARQ, in normal > usage, it is applied to each service request. > > See QueryIterService.
Thank you Andy (I forgot about SILENT... never used it before) Pointers for me (in the future, when I'll search for this): "The SILENT keyword indicates that errors encountered while accessing a remote SPARQL endpoint should be ignored while processing the query. The failed SERVICE clause is treated as if it had a result of a single solution with no bindings." --http://www.w3.org/TR/sparql11-federated-query/#serviceFailure QueryIterService.java is here: https://svn.apache.org/repos/asf/incubator/jena/Jena2/ARQ/trunk/src/main/java/com/hp/hpl/jena/sparql/engine/main/iterator/QueryIterService.java QueryIterator qIter ; try { qIter = Service.exec((OpService)op, getExecContext().getContext()) ; } catch (RuntimeException ex) { if ( silent ) { Log.warn(this, "SERVICE: "+ex.getMessage()) ; return QueryIterSingleton.create(BindingFactory.binding(), getExecContext()) ; } throw ex ; } Paolo
