Case 12-1
Casey is using XML to store information about the students in the science classes that he teaches. He wants to design a DTD that he can use to validate the XML documents that he uses for this purpose, and he comes to you for help.

-After you teach Casey about declarations for elements with child elements, he constructs the element declaration <!ELEMENT class ((seminar | lesson | workshop) , time?) >.Given this declaration, which of the following is NOT a valid "class" element?

Question

Quizplus · Accepted Answer

According to the element declaration, a "class" element must contain either a "seminar," "lesson," or "workshop" element, and optionally a "time" element. However, the third option (C) contains both a "seminar" and a "lesson" element, which does not meet the requirements of the DTD.

Case 12-1 Casey Is Using XML to Store Information About the Students