-- @atlcompiler emftvm
-- @path Graph=/TTC2011/metamodels/graph.ecore
query nrOfIsolatedNodes = Graph!Graph->allInstances()->first().isolatedNodes->size().debug('nrOfIsolatedNodes');

helper context Graph!Graph def : isolatedNodes : Sequence(Graph!Node) =
	self.nodes->reject(n|
		Graph!Edge.allInstances()->exists(e|e.src = n or e.trg = n));