"http://www.aifb.uni-karlsruhe.de/WBS/pha/rdf-query/queries/sample.rdf";

var ds = new datasource();
ds.insert(new datasource("inet?parsetype=rdf&url=" + server.urlencode(url), session.namespaces["ex"]));

//2. Return the name and, if known, the e-mail of the author of publication X. 
select ?n ?e using #ds where {[ex:author] [ex:Paper] ?a} and {?li ?a ?i} and {[ex:name] ?i ?n}
	and switch(?i)
	(
		case {[ex:email] ?i ?em}:
			?e = ?em
		default:
			?e= ''
	);