Case 13-2
Judy has begun to apply the basic information that you have given her about schemas, and she would now like your help in mastering the details of how schemas work.

-Judy would like to indicate that the substitution attribute mentioned in the previous problem is a required attribute.Which of the following attribute definitions shows how to accomplish this?

Question

Quizplus · Accepted Answer

In XML schema, the "use" attribute can have three possible values: "optional", "prohibited", or "required". The "required" value indicates that the attribute is mandatory and must be present in any instance of the element. Therefore, option A correctly shows how to indicate that the substitution attribute is required. Option B is incorrect because the "required" attribute does not exist. Option C is incorrect because the "use" attribute should be set to "required" instead of "mandatory". Option D is incorrect because the "status" attribute is not a valid attribute in XML schema.

Case 13-2 Judy Has Begun to Apply the Basic Information That You