Restructure the document in Figure 15.4, so as to completely replace the elements Name, Status, CrsCode, Semester,andCrsName with attributes in the appropriate tags. Provide a DTD suitable for this document. Specify all applicable ID and IDREF constraints.

What will be an ideal response?

The Student elements would now look as follows:

The Class elements will now have the following form:

The Course elements would now look as follows:

The corresponding DTDs will therefore be:

         

         

         

         

         

         

         

         

         

        

        
                                       Name CDATA #REQUIRED

                                       Status CDATA #REQUIRED>

        
                                  Semester CDATA #REQUIRED>

        
                                     CrsName CDATA #REQUIRED>

        
                                         Semester CDATA #REQUIRED>

        

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