{
  #include <string>  // Needed for ROOT 3.10

  // Load the dataset and DIAL libraries.
  gROOT->ProcessLine(".X load_dial.cxx+");

  // Load the macro for opening HBOOK files.
  gROOT->LoadMacro("open_hbook.C");

  // Instantiate XML parser and create DTD.
  XmlParser parser;
  DtdRegistry::instance("dataset").write();
  DtdRegistry::instance("dial").write();

  // Define location of Unique ID generator files.
  string dial_uids = Environment::current().value("DIAL_UIDS");
  UniqueIdGenerator::set_generator(dial_uids);

  // Instantiate access to the dataset repository (DR).
  // This is used to fetch a dataset with a dataset ID.
  dset::DatasetRepository& dr = dset::DatasetRepository::default_instance();

  // Instantiate access to the dataset selection catalog (DSC).
  // This is used to fetch a dataset ID with a dataset name.
  dset::DatasetSelectionCatalog&
    dsc = dset::DatasetSelectionCatalog::default_instance();

  // Instantiate access to the dataset replica catalog (DSC).
  // This is used to fetch the nonvirtual datasets mapped to
  // a virtual dataset.
  dset::DatasetReplicaCatalog&
    drc = dset::DatasetReplicaCatalog::default_instance();

  // Create client scheduler.
  // For interactive response:
  dial::WsClientScheduler msch("http://atlasgrid09.usatlas.bnl.gov:20011");
  // For long-running jobs:
  //dial::WsClientScheduler msch("http://atlasgrid09.usatlas.bnl.gov:20012");

  // Load scripts
  gROOT->ProcessLine(".L submit.C");
  gROOT->ProcessLine(".L evloop.C");

  // Define global job ID.
  dial::JobId jid;
  if ( FileStatus("jid").is_readable() ) {
    jid = JobId(Text("jid").line(0));
  }

  // Welcome message.
  cout << endl << "Welcome to DIAL demo 3" << endl;
  cout << "  To submit a job: root>";
  cout << " submit(appname, dataset_name)" << endl;
  cout << "  To display job: root> ";
  cout << " cout << endl << msch.job(jid) << endl;" << endl;
  cout << "  To fetch results: root> open_hbook()" << endl;
  //cout << "  To monitor a job: root> evloop()" << endl;
  cout << "See README for more information" << endl;
  cout << "Questions or problems to dladams@bnl.gov" << endl;
  cout << endl << msch << endl;
}