"7.1 Create a DTD for a catalog of cars, where each car has the child elements make, model, year, color, engine, number_of_doors, transmission_type, and accessories. The engine element has the child elements number _of_cylinders and fuel_system (carbureted or fuel_injected). The accessories element has the attributes radiio, air_conditioning, , power_windows, Power_steering, and Power_brakes, each of which is required and has the possible values of yes and no. Entities must be declared for the names of popular car makes.
Then this -
7.2Create XML document with at least three instances of the car element defined in the DTD of exercise 7.1 and produce a display of the raw xml document.