* Creates and stores the TransactionProvider, ExpressDataProvider, and the
* MdmMetadataProvider.
*/
private void _createProviders() {
showInfo("Creating a TransactionProvider...");
tp = new ExpressTransactionProvider();
// Add another property to notify Oracle OLAP to use unique values,
// which include the hierarchy, the level, and the local value for an
// element of a dimension.
props.setProperty("HierarchyValueType", "unique");