A Real Estate, Inc, sells houses. clients who want to sell their houses sign a contract with the company and give information on their house. this information is stored in a database by the company, and a subset of this information is sent to the citywide multiple listing services used by all real estate agents. the company works with two types of potential buyers. some buyers have an interest in one specific house. in this case, the company prints information from its database, which the real estate agent uses to help show the house to the buyer (a process beyond the scope of the system to be modeled). other buyers seek the company's advice in finding a house that meets their needs. in this case, the buyer completes a buyer information form that is entered into a buyer database, and the company estate agents use its information to search the company's database and the multiple listing service for houses that meet their needs. the results of these searches are printed and used to help the real estate agent show houses to the buyer.
Draw a level 0 data flow diagram for the real estate system using Visible Analyst diagramming tool.