XML information can sometimes be specified either as attributes or as elements, for example
   <book title="Elektronic Mail"/>
   <book><title>Electronic Mail</title></book>
Discuss pros and cons of these alternative methods.


Advantage with attribute: Gives some type control, for example you can enumerate allowed values or specify a default value. With ID/IREF can references between objects be handled.

Advantage with element: Can be repeated with multiple values, Can have an internal substructure.

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