Start Level 1 Node: Workbooks in Travel ManagementWorkbooks in Travel ManagementEnd Level 1 Node: Workbooks in Travel Management
   Start Level 2 Node: Overview of Travel ExpensesOverview of Travel ExpensesEnd Level 2 Node: Overview of Travel Expenses
   Start Level 2 Node: Number of TripsNumber of TripsEnd Level 2 Node: Number of Trips
   Start Level 2 Node: Expense ReceiptsExpense ReceiptsEnd Level 2 Node: Expense Receipts
   Start Level 2 Node: Individual FlightsIndividual FlightsEnd Level 2 Node: Individual Flights
   Start Level 2 Node: Flight Bookings by City PairsFlight Bookings by City PairsEnd Level 2 Node: Flight Bookings by City Pairs
   Start Level 2 Node: Flight Bookings by ProviderFlight Bookings by ProviderEnd Level 2 Node: Flight Bookings by Provider
   Start Level 2 Node: Hotel Bookings by ProviderHotel Bookings by ProviderEnd Level 2 Node: Hotel Bookings by Provider
   Start Level 2 Node: Hotel Bookings by Geographical HierarchyHotel Bookings by Geographical HierarchyEnd Level 2 Node: Hotel Bookings by Geographical Hierarchy
   Start Level 2 Node: Car Rental Bookings by ProviderCar Rental Bookings by ProviderEnd Level 2 Node: Car Rental Bookings by Provider
   Start Level 2 Node: Car Rental Bookings by Geographical HierarchyCar Rental Bookings by Geographical HierarchyEnd Level 2 Node: Car Rental Bookings by Geographical Hierarchy