Please follow the below link to understand how the Contoso Demo Data works.
https://mbs.microsoft.com/downloads/customer/AX2009Docs/DemoDataOverviewforDynamicsAX2009.pdf
Please follow the below link to understand how the Contoso Demo Data works.
https://mbs.microsoft.com/downloads/customer/AX2009Docs/DemoDataOverviewforDynamicsAX2009.pdf