public class InputFileGlobalScope extends AbstractDeclarativeScopeProvider
		implements IGlobalScopeProvider {

....

	@Inject
	private IResourceDescriptions allDescriptions;

	public IScope scope_Include_includedInputFile(InputFile inputFile,
			EReference reference) {
		List<IEObjectDescription> allElements = new ArrayList<IEObjectDescription>();

		for (IResourceDescription resource : allDescriptions
				.getAllResourceDescriptions()) {
			IEObjectDescription objectDescription = Iterables
					.getOnlyElement(resource
							.getExportedObjects(InputFilePackage.eINSTANCE
									.getInputFile()));

			allElements.add(objectDescription);
		}

		return new SimpleScope(allElements);
	}
}