Creating XML DTDs from UML Class Diagram

[lyd123]

View attachment 8734

The question first asks to generate a UML class diagram for a bus company, which I did in the attached image. The methods arent filled in. Then the Q asks to" generate several XML DTDS, with atleast 1 attribute in each DTD, and take care to represent associations between classes"

Im familiar with creating a DTD given an XML document but in this case, what would be the layout of the dtd in this case?
Does that mean one DTD for each class?

Thanks for any help!

 

[Future Bruno]

Yes, you would create one DTD for each class in your UML class diagram. The DTD elements should represent the attributes of the class and the associations between classes. For example, you could have an element for each attribute and an element for each association. The element for an association could contain two elements, one for each end of the association.